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Delayed start problem
Delayed start problem
My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
it is cool. When the key is turned to run, the check engine light
does not turn on right away. There is a delay of a few seconds and
then the relays in the power distribution box under the hood start to
click rapidly. Once this happens, the fuel pump runs for a short
while and the jeep can be started. It seems like the computer is not
aware right away that the ignition has been turned to run. If I
immediately turn the key to run again (after first returning it to
lock) the check engine and fuel pump turn on normally. After letting
the jeep sit turned off for about 5-10 minutes, the problem will
return. Later in the day when it is hot, this almost never happens but
it does once in a long while, usually after sitting turned off for at
least a few hours. What could be causing this? What could cause it to
work fine on the second try?
Thanks
My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
it is cool. When the key is turned to run, the check engine light
does not turn on right away. There is a delay of a few seconds and
then the relays in the power distribution box under the hood start to
click rapidly. Once this happens, the fuel pump runs for a short
while and the jeep can be started. It seems like the computer is not
aware right away that the ignition has been turned to run. If I
immediately turn the key to run again (after first returning it to
lock) the check engine and fuel pump turn on normally. After letting
the jeep sit turned off for about 5-10 minutes, the problem will
return. Later in the day when it is hot, this almost never happens but
it does once in a long while, usually after sitting turned off for at
least a few hours. What could be causing this? What could cause it to
work fine on the second try?
Thanks
Re: Delayed start problem
nrs wrote:
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
You are giving the classic description of a bad main power connection.
I would suspect the body's ground connection first.
The power takes time to arc the bad place and connect. Heat can expand
connections tightening them up. Once arced the connection can work for a
while also. This will get worse usually sooner than later.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http :// www .imagestation,com /album/pictures.html?id!15147590
(More Off Road album links at bottom of the view page)
nrs wrote:
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
You are giving the classic description of a bad main power connection.
I would suspect the body's ground connection first.
The power takes time to arc the bad place and connect. Heat can expand
connections tightening them up. Once arced the connection can work for a
while also. This will get worse usually sooner than later.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http :// www .imagestation,com /album/pictures.html?id!15147590
(More Off Road album links at bottom of the view page)
Re: Delayed start problem
On Sep 26, 10:34 am, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks
>
> You are giving the classic description of a bad main power connection.
> I would suspect the body's ground connection first.
>
> The power takes time to arc the bad place and connect. Heat can expand
> connections tightening them up. Once arced the connection can work for a
> while also. This will get worse usually sooner than later.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http :// www .imagestation,com /album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Following your advice posted in previous threads I have done the
following:
1) cleaned claps and installed new battery (it was old anyway).
2) cleaned the engine ground connection behind the dipstick bracket
3) cleaned the ground connection on the firewall just to the side of
the battery.
4) cleaned the positive connection to the power distribution box
There are a few more ground straps though. That about the heat
expanding the connections makes sense. Thanks!
On Sep 26, 10:34 am, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks
>
> You are giving the classic description of a bad main power connection.
> I would suspect the body's ground connection first.
>
> The power takes time to arc the bad place and connect. Heat can expand
> connections tightening them up. Once arced the connection can work for a
> while also. This will get worse usually sooner than later.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http :// www .imagestation,com /album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
Following your advice posted in previous threads I have done the
following:
1) cleaned claps and installed new battery (it was old anyway).
2) cleaned the engine ground connection behind the dipstick bracket
3) cleaned the ground connection on the firewall just to the side of
the battery.
4) cleaned the positive connection to the power distribution box
There are a few more ground straps though. That about the heat
expanding the connections makes sense. Thanks!
Re: Delayed start problem
I'd check the relay first, right off the bat.
nrs wrote:
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
I'd check the relay first, right off the bat.
nrs wrote:
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
Re: Delayed start problem
On Sep 26, 10:40 am, FrankW <fw...@norpak.ca> wrote:
> I'd check the relay first, right off the bat.
>
>
>
> nrs wrote:
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks- Hide quoted text -
>
> - Show quoted text -
I forgot to mention I removed the relays, cleaned the connections,
moved them around, then decided to replace both the fuel pump and ASD
relays. No change in behavior, but now I have spare relays! Thanks
On Sep 26, 10:40 am, FrankW <fw...@norpak.ca> wrote:
> I'd check the relay first, right off the bat.
>
>
>
> nrs wrote:
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks- Hide quoted text -
>
> - Show quoted text -
I forgot to mention I removed the relays, cleaned the connections,
moved them around, then decided to replace both the fuel pump and ASD
relays. No change in behavior, but now I have spare relays! Thanks
Re: Delayed start problem
Sounds normal to me, you must give the computer time to run it's
diagnosis. A common reason why the on board error code is not displayed,
people won't wait before starting the on and off sequence.
God Bless America, Bill O|||||||O
mailto:LWHughes3rd@aol,com http :// www .billhughes,com /
"nrs" <neale_rs@yahoo,com > wrote in message
news:1190820101.531771.116790@n39g2000hsh.googlegroups,com ...
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
--
Posted via a free Usenet account from http :// www .teranews,com
Sounds normal to me, you must give the computer time to run it's
diagnosis. A common reason why the on board error code is not displayed,
people won't wait before starting the on and off sequence.
God Bless America, Bill O|||||||O
mailto:LWHughes3rd@aol,com http :// www .billhughes,com /
"nrs" <neale_rs@yahoo,com > wrote in message
news:1190820101.531771.116790@n39g2000hsh.googlegroups,com ...
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
--
Posted via a free Usenet account from http :// www .teranews,com
Re: Delayed start problem
On Sep 26, 5:24 pm, "L.W. \(Bill\) Hughes III"
<LWBillHug...@hughes,net > wrote:
> Sounds normal to me, you must give the computer time to run it's
> diagnosis. A common reason why the on board error code is not displayed,
> people won't wait before starting the on and off sequence.
> God Bless America, Bill O|||||||O
> mailto:LWHughes...@aol,com http :// www .billhughes,com /
>
> "nrs" <neale...@yahoo,com > wrote in message
>
> news:1190820101.531771.116790@n39g2000hsh.googlegroups,com ...
>
>
>
>
>
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks
>
> --
> Posted via a free Usenet account from http :// www .teranews,com - Hide quoted text -
>
> - Show quoted text -
Thanks, I'll keep this in mind but I'm afraid that one day it just
won't start if I let it go on like this. In fact, on a recent trip to
the mountans where it was pretty cold, I had to be towed part way down
until it just decided to start again. It seems the cold is a major
factor here.
On Sep 26, 5:24 pm, "L.W. \(Bill\) Hughes III"
<LWBillHug...@hughes,net > wrote:
> Sounds normal to me, you must give the computer time to run it's
> diagnosis. A common reason why the on board error code is not displayed,
> people won't wait before starting the on and off sequence.
> God Bless America, Bill O|||||||O
> mailto:LWHughes...@aol,com http :// www .billhughes,com /
>
> "nrs" <neale...@yahoo,com > wrote in message
>
> news:1190820101.531771.116790@n39g2000hsh.googlegroups,com ...
>
>
>
>
>
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks
>
> --
> Posted via a free Usenet account from http :// www .teranews,com - Hide quoted text -
>
> - Show quoted text -
Thanks, I'll keep this in mind but I'm afraid that one day it just
won't start if I let it go on like this. In fact, on a recent trip to
the mountans where it was pretty cold, I had to be towed part way down
until it just decided to start again. It seems the cold is a major
factor here.
Re: Delayed start problem
You mean the starter wouldn't turn, like a bad connection to the
battery?
God Bless America, Bill O|||||||O
mailto:LWHughes3rd@aol,com http :// www .billhughes,com /
"nrs" <neale_rs@yahoo,com > wrote in message
news:1190847308.806083.87960@r29g2000hsg.googlegroups,com ...
>
> Thanks, I'll keep this in mind but I'm afraid that one day it just
> won't start if I let it go on like this. In fact, on a recent trip to
> the mountans where it was pretty cold, I had to be towed part way down
> until it just decided to start again. It seems the cold is a major
> factor here.
>
--
Posted via a free Usenet account from http :// www .teranews,com
You mean the starter wouldn't turn, like a bad connection to the
battery?
God Bless America, Bill O|||||||O
mailto:LWHughes3rd@aol,com http :// www .billhughes,com /
"nrs" <neale_rs@yahoo,com > wrote in message
news:1190847308.806083.87960@r29g2000hsg.googlegroups,com ...
>
> Thanks, I'll keep this in mind but I'm afraid that one day it just
> won't start if I let it go on like this. In fact, on a recent trip to
> the mountans where it was pretty cold, I had to be towed part way down
> until it just decided to start again. It seems the cold is a major
> factor here.
>
--
Posted via a free Usenet account from http :// www .teranews,com
Re: Delayed start problem
nrs wrote:
> Thanks, I'll keep this in mind but I'm afraid that one day it just
> won't start if I let it go on like this. In fact, on a recent trip to
> the mountans where it was pretty cold, I had to be towed part way down
> until it just decided to start again. It seems the cold is a major
> factor here.
How's the battery voltage and fluid level?
--
DougW
nrs wrote:
> Thanks, I'll keep this in mind but I'm afraid that one day it just
> won't start if I let it go on like this. In fact, on a recent trip to
> the mountans where it was pretty cold, I had to be towed part way down
> until it just decided to start again. It seems the cold is a major
> factor here.
How's the battery voltage and fluid level?
--
DougW
Re: Delayed start problem
On Sep 26, 6:11 pm, "DougW" <I.only.read.use...@invalid.address>
wrote:
> nrs wrote:
> > Thanks, I'll keep this in mind but I'm afraid that one day it just
> > won't start if I let it go on like this. In fact, on a recent trip to
> > the mountans where it was pretty cold, I had to be towed part way down
> > until it just decided to start again. It seems the cold is a major
> > factor here.
>
> How's the battery voltage and fluid level?
>
> --
> DougW
I got a new battery soon after the problem started. It checks out
fine, I'm pretty sure it must be something else.
On Sep 26, 6:11 pm, "DougW" <I.only.read.use...@invalid.address>
wrote:
> nrs wrote:
> > Thanks, I'll keep this in mind but I'm afraid that one day it just
> > won't start if I let it go on like this. In fact, on a recent trip to
> > the mountans where it was pretty cold, I had to be towed part way down
> > until it just decided to start again. It seems the cold is a major
> > factor here.
>
> How's the battery voltage and fluid level?
>
> --
> DougW
I got a new battery soon after the problem started. It checks out
fine, I'm pretty sure it must be something else.
Re: Delayed start problem
On Sep 26, 5:55 pm, nrs <neale...@yahoo,com > wrote:
> On Sep 26, 5:24 pm, "L.W. \(Bill\) Hughes III"
>
>
>
>
>
> <LWBillHug...@hughes,net > wrote:
> > Sounds normal to me, you must give the computer time to run it's
> > diagnosis. A common reason why the on board error code is not displayed,
> > people won't wait before starting the on and off sequence.
> > God Bless America, Bill O|||||||O
> > mailto:LWHughes...@aol,com http :// www .billhughes,com /
>
> > "nrs" <neale...@yahoo,com > wrote in message
>
> >news:1190820101.531771.116790@n39g2000hsh.googlegroups,com ...
>
> > > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > > it is cool. When the key is turned to run, the check engine light
> > > does not turn on right away. There is a delay of a few seconds and
> > > then the relays in the power distribution box under the hood start to
> > > click rapidly. Once this happens, the fuel pump runs for a short
> > > while and the jeep can be started. It seems like the computer is not
> > > aware right away that the ignition has been turned to run. If I
> > > immediately turn the key to run again (after first returning it to
> > > lock) the check engine and fuel pump turn on normally. After letting
> > > the jeep sit turned off for about 5-10 minutes, the problem will
> > > return. Later in the day when it is hot, this almost never happens but
> > > it does once in a long while, usually after sitting turned off for at
> > > least a few hours. What could be causing this? What could cause it to
> > > work fine on the second try?
>
> > > Thanks
>
> > --
> > Posted via a free Usenet account from http :// www .teranews,com -Hide quoted text -
>
> > - Show quoted text -
>
> Thanks, I'll keep this in mind but I'm afraid that one day it just
> won't start if I let it go on like this. In fact, on a recent trip to
> the mountans where it was pretty cold, I had to be towed part way down
> until it just decided to start again. It seems the cold is a major
> factor here.- Hide quoted text -
>
> - Show quoted text -
Bill,
The starter always works fine (always cranks). But if the computer
has not provided a ground to the fuel pump relay, it won't start and
run. Both the check engine light and the ASD and fuel pump relays are
supposed to get a ground from the computer. I don't know if it is
because the computer is not getting 12v from the ignition switch or if
it is unable to get a good ground.
Latest test: I put a test light on pin 5 on the computer data link
connector to see if that point was getting 12v as soon as the
ingnition switch is turned to run. It checked out fine, but the check
engine and relays still have a (this time) 6 second delay before it
turns on. I'm now thinking it is either:
1) the wire from the data link connector splice to the computer that,
or
2) the computer has a bad ground connection (even though I cleaned it
already), or
3) the computer or its connector is going bad.
On Sep 26, 5:55 pm, nrs <neale...@yahoo,com > wrote:
> On Sep 26, 5:24 pm, "L.W. \(Bill\) Hughes III"
>
>
>
>
>
> <LWBillHug...@hughes,net > wrote:
> > Sounds normal to me, you must give the computer time to run it's
> > diagnosis. A common reason why the on board error code is not displayed,
> > people won't wait before starting the on and off sequence.
> > God Bless America, Bill O|||||||O
> > mailto:LWHughes...@aol,com http :// www .billhughes,com /
>
> > "nrs" <neale...@yahoo,com > wrote in message
>
> >news:1190820101.531771.116790@n39g2000hsh.googlegroups,com ...
>
> > > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > > it is cool. When the key is turned to run, the check engine light
> > > does not turn on right away. There is a delay of a few seconds and
> > > then the relays in the power distribution box under the hood start to
> > > click rapidly. Once this happens, the fuel pump runs for a short
> > > while and the jeep can be started. It seems like the computer is not
> > > aware right away that the ignition has been turned to run. If I
> > > immediately turn the key to run again (after first returning it to
> > > lock) the check engine and fuel pump turn on normally. After letting
> > > the jeep sit turned off for about 5-10 minutes, the problem will
> > > return. Later in the day when it is hot, this almost never happens but
> > > it does once in a long while, usually after sitting turned off for at
> > > least a few hours. What could be causing this? What could cause it to
> > > work fine on the second try?
>
> > > Thanks
>
> > --
> > Posted via a free Usenet account from http :// www .teranews,com -Hide quoted text -
>
> > - Show quoted text -
>
> Thanks, I'll keep this in mind but I'm afraid that one day it just
> won't start if I let it go on like this. In fact, on a recent trip to
> the mountans where it was pretty cold, I had to be towed part way down
> until it just decided to start again. It seems the cold is a major
> factor here.- Hide quoted text -
>
> - Show quoted text -
Bill,
The starter always works fine (always cranks). But if the computer
has not provided a ground to the fuel pump relay, it won't start and
run. Both the check engine light and the ASD and fuel pump relays are
supposed to get a ground from the computer. I don't know if it is
because the computer is not getting 12v from the ignition switch or if
it is unable to get a good ground.
Latest test: I put a test light on pin 5 on the computer data link
connector to see if that point was getting 12v as soon as the
ingnition switch is turned to run. It checked out fine, but the check
engine and relays still have a (this time) 6 second delay before it
turns on. I'm now thinking it is either:
1) the wire from the data link connector splice to the computer that,
or
2) the computer has a bad ground connection (even though I cleaned it
already), or
3) the computer or its connector is going bad.
Re: Delayed start problem
Well, you've got a couple of relays in the fuel system, too:
http :// www .billhughes,com /temp/95yjFuel.pdf But, it now sounds like the
Crankshaft Position Sensor without it's cue nothing happens, except the
cranking:
http :// s112.photobucket,com /albums/n171/Billy_Ray_2006/Crankshaft%20Position%20Sensor/
http :// jeep.off-road,com /jeep/article/articleDetail.jsp?id=257990
God Bless America, Bill O|||||||O
mailto:LWHughes3rd@aol,com
"nrs" <neale_rs@yahoo,com > wrote in message
news:1190902506.237380.275570@g4g2000hsf.googlegroups,com ...
>
> Bill,
> The starter always works fine (always cranks). But if the computer
> has not provided a ground to the fuel pump relay, it won't start and
> run. Both the check engine light and the ASD and fuel pump relays are
> supposed to get a ground from the computer. I don't know if it is
> because the computer is not getting 12v from the ignition switch or if
> it is unable to get a good ground.
>
> Latest test: I put a test light on pin 5 on the computer data link
> connector to see if that point was getting 12v as soon as the
> ingnition switch is turned to run. It checked out fine, but the check
> engine and relays still have a (this time) 6 second delay before it
> turns on. I'm now thinking it is either:
>
> 1) the wire from the data link connector splice to the computer that,
> or
> 2) the computer has a bad ground connection (even though I cleaned it
> already), or
> 3) the computer or its connector is going bad.
>
--
Posted via a free Usenet account from http :// www .teranews,com
Well, you've got a couple of relays in the fuel system, too:
http :// www .billhughes,com /temp/95yjFuel.pdf But, it now sounds like the
Crankshaft Position Sensor without it's cue nothing happens, except the
cranking:
http :// s112.photobucket,com /albums/n171/Billy_Ray_2006/Crankshaft%20Position%20Sensor/
http :// jeep.off-road,com /jeep/article/articleDetail.jsp?id=257990
God Bless America, Bill O|||||||O
mailto:LWHughes3rd@aol,com
"nrs" <neale_rs@yahoo,com > wrote in message
news:1190902506.237380.275570@g4g2000hsf.googlegroups,com ...
>
> Bill,
> The starter always works fine (always cranks). But if the computer
> has not provided a ground to the fuel pump relay, it won't start and
> run. Both the check engine light and the ASD and fuel pump relays are
> supposed to get a ground from the computer. I don't know if it is
> because the computer is not getting 12v from the ignition switch or if
> it is unable to get a good ground.
>
> Latest test: I put a test light on pin 5 on the computer data link
> connector to see if that point was getting 12v as soon as the
> ingnition switch is turned to run. It checked out fine, but the check
> engine and relays still have a (this time) 6 second delay before it
> turns on. I'm now thinking it is either:
>
> 1) the wire from the data link connector splice to the computer that,
> or
> 2) the computer has a bad ground connection (even though I cleaned it
> already), or
> 3) the computer or its connector is going bad.
>
--
Posted via a free Usenet account from http :// www .teranews,com
Re: Delayed start problem
On Sep 27, 11:23 am, "L.W. \(Bill\) Hughes III"
<LWBillHug...@hughes,net > wrote:
> Well, you've got a couple of relays in the fuel system, too: http :// www .billhughes,com /temp/95yjFuel.pdfBut, it now sounds like the
> Crankshaft Position Sensor without it's cue nothing happens, except the
> cranking: http :// s112.photobucket,com /albums/n171/Billy_Ray_2006/Crankshaft%20P... http :// jeep.off-road,com /jeep/article/articleDetail.jsp?id=257990
> God Bless America, Bill O|||||||O
> mailto:LWHughes...@aol,com
>
> "nrs" <neale...@yahoo,com > wrote in message
>
> news:1190902506.237380.275570@g4g2000hsf.googlegroups,com ...
>
>
>
>
>
>
>
> > Bill,
> > The starter always works fine (always cranks). But if the computer
> > has not provided a ground to the fuel pump relay, it won't start and
> > run. Both the check engine light and the ASD and fuel pump relays are
> > supposed to get a ground from the computer. I don't know if it is
> > because the computer is not getting 12v from the ignition switch or if
> > it is unable to get a good ground.
>
> > Latest test: I put a test light on pin 5 on the computer data link
> > connector to see if that point was getting 12v as soon as the
> > ingnition switch is turned to run. It checked out fine, but the check
> > engine and relays still have a (this time) 6 second delay before it
> > turns on. I'm now thinking it is either:
>
> > 1) the wire from the data link connector splice to the computer that,
> > or
> > 2) the computer has a bad ground connection (even though I cleaned it
> > already), or
> > 3) the computer or its connector is going bad.
>
> --
> Posted via a free Usenet account from http :// www .teranews,com - Hide quoted text -
>
> - Show quoted text -
I cleaned the CPS connector but the sensor itself could be bad. Can a
bad CPS keep the check engine light from turning on right away? I
think the computer allows about 3 seconds to get at signal from the
CPS but I don't know if others have reported the check engine light
not lighting due to a bad CPS. Thanks
On Sep 27, 11:23 am, "L.W. \(Bill\) Hughes III"
<LWBillHug...@hughes,net > wrote:
> Well, you've got a couple of relays in the fuel system, too: http :// www .billhughes,com /temp/95yjFuel.pdfBut, it now sounds like the
> Crankshaft Position Sensor without it's cue nothing happens, except the
> cranking: http :// s112.photobucket,com /albums/n171/Billy_Ray_2006/Crankshaft%20P... http :// jeep.off-road,com /jeep/article/articleDetail.jsp?id=257990
> God Bless America, Bill O|||||||O
> mailto:LWHughes...@aol,com
>
> "nrs" <neale...@yahoo,com > wrote in message
>
> news:1190902506.237380.275570@g4g2000hsf.googlegroups,com ...
>
>
>
>
>
>
>
> > Bill,
> > The starter always works fine (always cranks). But if the computer
> > has not provided a ground to the fuel pump relay, it won't start and
> > run. Both the check engine light and the ASD and fuel pump relays are
> > supposed to get a ground from the computer. I don't know if it is
> > because the computer is not getting 12v from the ignition switch or if
> > it is unable to get a good ground.
>
> > Latest test: I put a test light on pin 5 on the computer data link
> > connector to see if that point was getting 12v as soon as the
> > ingnition switch is turned to run. It checked out fine, but the check
> > engine and relays still have a (this time) 6 second delay before it
> > turns on. I'm now thinking it is either:
>
> > 1) the wire from the data link connector splice to the computer that,
> > or
> > 2) the computer has a bad ground connection (even though I cleaned it
> > already), or
> > 3) the computer or its connector is going bad.
>
> --
> Posted via a free Usenet account from http :// www .teranews,com - Hide quoted text -
>
> - Show quoted text -
I cleaned the CPS connector but the sensor itself could be bad. Can a
bad CPS keep the check engine light from turning on right away? I
think the computer allows about 3 seconds to get at signal from the
CPS but I don't know if others have reported the check engine light
not lighting due to a bad CPS. Thanks
Re: Delayed start problem
nrs wrote:
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
One more thought for you.
There is a recall on your emergency brake lever and the ground for the
fuel pump bolts onto the frame of this lever on your 95 YJ. There have
been posted 'fuel pump' and 'ECM' 'failures' right after this job is
done if the wire doesn't get hooked back up. Maybe your ground there is
bad?
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http :// www .imagestation,com /album/pictures.html?id!15147590
(More Off Road album links at bottom of the view page)
nrs wrote:
> My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> it is cool. When the key is turned to run, the check engine light
> does not turn on right away. There is a delay of a few seconds and
> then the relays in the power distribution box under the hood start to
> click rapidly. Once this happens, the fuel pump runs for a short
> while and the jeep can be started. It seems like the computer is not
> aware right away that the ignition has been turned to run. If I
> immediately turn the key to run again (after first returning it to
> lock) the check engine and fuel pump turn on normally. After letting
> the jeep sit turned off for about 5-10 minutes, the problem will
> return. Later in the day when it is hot, this almost never happens but
> it does once in a long while, usually after sitting turned off for at
> least a few hours. What could be causing this? What could cause it to
> work fine on the second try?
>
> Thanks
>
One more thought for you.
There is a recall on your emergency brake lever and the ground for the
fuel pump bolts onto the frame of this lever on your 95 YJ. There have
been posted 'fuel pump' and 'ECM' 'failures' right after this job is
done if the wire doesn't get hooked back up. Maybe your ground there is
bad?
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http :// www .imagestation,com /album/pictures.html?id!15147590
(More Off Road album links at bottom of the view page)
Re: Delayed start problem
On Sep 27, 11:02 am, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks
>
> One more thought for you.
>
> There is a recall on your emergency brake lever and the ground for the
> fuel pump bolts onto the frame of this lever on your 95 YJ. There have
> been posted 'fuel pump' and 'ECM' 'failures' right after this job is
> done if the wire doesn't get hooked back up. Maybe your ground there is
> bad?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http :// www .imagestation,com /album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
I'll check that one ASAP. Thanks.
On Sep 27, 11:02 am, Mike Romain <roma...@sympatico.ca> wrote:
> nrs wrote:
> > My '95 2.5 AX5 YJ has a strange problem, usually in the morning when
> > it is cool. When the key is turned to run, the check engine light
> > does not turn on right away. There is a delay of a few seconds and
> > then the relays in the power distribution box under the hood start to
> > click rapidly. Once this happens, the fuel pump runs for a short
> > while and the jeep can be started. It seems like the computer is not
> > aware right away that the ignition has been turned to run. If I
> > immediately turn the key to run again (after first returning it to
> > lock) the check engine and fuel pump turn on normally. After letting
> > the jeep sit turned off for about 5-10 minutes, the problem will
> > return. Later in the day when it is hot, this almost never happens but
> > it does once in a long while, usually after sitting turned off for at
> > least a few hours. What could be causing this? What could cause it to
> > work fine on the second try?
>
> > Thanks
>
> One more thought for you.
>
> There is a recall on your emergency brake lever and the ground for the
> fuel pump bolts onto the frame of this lever on your 95 YJ. There have
> been posted 'fuel pump' and 'ECM' 'failures' right after this job is
> done if the wire doesn't get hooked back up. Maybe your ground there is
> bad?
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's - Gone to the rust pile...
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http :// www .imagestation,com /album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)- Hide quoted text -
>
> - Show quoted text -
I'll check that one ASAP. Thanks.
