PCM re-learn

[Transamman25]

How long should the PCM be unplugged before the computer needs to relearn the engine .. my engine when first installed had quite a few exhaust leaks tricking the engine into thinking it was running lean .. now that all my exhaust leaks are fixed it runs 8:1 fuel ratio !! damn your eyes burn sitting in the car while at idle .. not to mention it really kills the engine now - I plan on getting Comp Cams here in memphis to reprogram tommorow IF they can get it in

[Hrtbeat1]

Should only take about 10 to 15 seconds. It's just clearing out the BLM's and INT's for a OBD I or the STFT LTFT for an OBD II.

Running that rich I don't think the PCM can adjust itself that much. Mine is running around 11.5 A/F ratio @ WOT with my new exhaust. Not sure what its at when not @ WOT. BTW when in WOT the PCM is not in learning mode.

:hello: :usa:

[foff667]

1st how are you determining its running @ 8:1

2nd how are you running 8:1? is this at idle? are you running like 48lb injectors or something with no tuning?

[Transamman25]

well 8:1 is a educated guess being as i clean my new stainless tips let the car idle and a timed 5 minutes later i can pull atleast 1/16 th of an inch of fuel off the tip and at wide open a/f mix is controlled by the mass air flow sensor which was replaced not 6 months ago

[Chris 96 WS6]

well 8:1 is a educated guess being as i clean my new stainless tips let the car idle and a timed 5 minutes later i can pull atleast 1/16 th of an inch of fuel off the tip

Sounds more like an uneducated guess. :twak:

[Grims]

What I was goin say ;)