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Lean Burn
I've got a vehicle that is running less than one tenth of a volt on O2
sensor...I can trick vehicle to run rich at 0.9 volt.
This is a 1984 Bosch LH II system, which currently is only using the
Air Mass Meter (Mass Air Flow) to determine fuel amount.
At this time, I have concluded the ECU (ECM) is messed up.
Question - It drives OK....no higher RPM misses...just smooth driving.
At idle, its a pinch rough.....should I fix it?
Water temp is OK....
"Foot" <Walks@bigmountain . net > wrote in message
news:ns3o0413jki9187tjttdfsghhdc8vo80vp@4ax . com ...
>
> I've got a vehicle that is running less than one tenth of a volt on O2
> sensor...I can trick vehicle to run rich at 0.9 volt.
>
> This is a 1984 Bosch LH II system, which currently is only using the
> Air Mass Meter (Mass Air Flow) to determine fuel amount.
>
> At this time, I have concluded the ECU (ECM) is messed up.
>
> Question - It drives OK....no higher RPM misses...just smooth driving.
> At idle, its a pinch rough.....should I fix it?
>
> Water temp is OK....
>
What vehicle ? What engine ? How are you tricking it to run rich ? Any
codes stored ?
On Mon, 21 Apr 2008 04:23:30 GMT, "Mike" <mik@localnet . com > wrote:
>> This is a 1984 Bosch LH II system, which currently is only using the
>> Air Mass Meter (Mass Air Flow) to determine fuel amount.
>>
>> At this time, I have concluded the ECU (ECM) is messed up.
>>
>> Question - It drives OK....no higher RPM misses...just smooth driving.
>> At idle, its a pinch rough.....should I fix it?
>>
>> Water temp is OK....
>>
>
> What vehicle ? What engine ? How are you tricking it to run rich ? Any
>codes stored ?
1984 Volvo (2.3 Liter)...no codes possible on Bosch LH II system.
I pull plug on Air Mass Meter.. . it will run rich.
Oh well, I'll just buy a rebuilt ECU (ECM) for it
>> This is a 1984 Bosch LH II system, which currently is only using the
>> Air Mass Meter (Mass Air Flow) to determine fuel amount.
>>
>> At this time, I have concluded the ECU (ECM) is messed up.
>>
>> Question - It drives OK....no higher RPM misses...just smooth driving.
>> At idle, its a pinch rough.....should I fix it?
>>
>> Water temp is OK....
>>
>
> What vehicle ? What engine ? How are you tricking it to run rich ? Any
>codes stored ?
1984 Volvo (2.3 Liter)...no codes possible on Bosch LH II system.
I pull plug on Air Mass Meter.. . it will run rich.
Oh well, I'll just buy a rebuilt ECU (ECM) for it
On Apr 20, 10:58 pm, Foot <Wa...@bigmountain . net > wrote:
> I've got a vehicle that is running less than one tenth of a volt on O2
> sensor...I can trick vehicle to run rich at 0.9 volt.
>
> This is a 1984 Bosch LH II system, which currently is only using the
> Air Mass Meter (Mass Air Flow) to determine fuel amount.
>
> At this time, I have concluded the ECU (ECM) is messed up.
>
> Question - It drives OK....no higher RPM misses...just smooth driving.
> At idle, its a pinch rough.....should I fix it?
>
> Water temp is OK....
Maybe in modern engines it is safer, but running too lean in the past
was a good way to burn piston crowns and valves.
> I've got a vehicle that is running less than one tenth of a volt on O2
> sensor...I can trick vehicle to run rich at 0.9 volt.
>
> This is a 1984 Bosch LH II system, which currently is only using the
> Air Mass Meter (Mass Air Flow) to determine fuel amount.
>
> At this time, I have concluded the ECU (ECM) is messed up.
>
> Question - It drives OK....no higher RPM misses...just smooth driving.
> At idle, its a pinch rough.....should I fix it?
>
> Water temp is OK....
Maybe in modern engines it is safer, but running too lean in the past
was a good way to burn piston crowns and valves.
