over fueling wont run
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Joined: Apr 2015
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over fueling wont run hi guys im new on here my buddy and i have done conversions to our 4x4's i have a nissan patrol and put ls1 in it man what a beast very happy with the power gain i have been back on the road for about 2 months i am running a stock ls1 .heres the problem my buddy has a mild cam in his ls1 the thing will not run with his pcm its over fueling something bad his pcm is tuned for the cam put my pcm in his car and runs like a dream put his pcm in my car runs like a dream .with his pcm in his car there is no codes thrown up at all ,have checked injector pulse with niod light ,running maffles tune fuel pressure is 58-60 psi .
we are kinda stuck for ideas tuner said there might be problem with wirring thats why we changed pcm's over to check .
it doesnt seem like its wirring pcm engine or tune
would love for someone to point us in the right direction as we can not think of anything that could be causing this issue
cheers guys
rick
we are kinda stuck for ideas tuner said there might be problem with wirring thats why we changed pcm's over to check .
it doesnt seem like its wirring pcm engine or tune
would love for someone to point us in the right direction as we can not think of anything that could be causing this issue
cheers guys
rick
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Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
I am sorry that no one ever replied to your question.
I suspect this mystery cannot be resolved without hooking up a tuner, such as HP Tuners or EFILive, to determine what is going on.
As a wild guess, the PCM that works on both engines might be set to (stock) closed-loop operation which lets the PCM auto-adjust to minor engine differences. The PCM that only works on one engine might be set to open-loop operation which has no auto-adjust.
You best solution is likely to send out the PCM to a tuner, giving them your car and engine specs.
I suspect this mystery cannot be resolved without hooking up a tuner, such as HP Tuners or EFILive, to determine what is going on.
As a wild guess, the PCM that works on both engines might be set to (stock) closed-loop operation which lets the PCM auto-adjust to minor engine differences. The PCM that only works on one engine might be set to open-loop operation which has no auto-adjust.
You best solution is likely to send out the PCM to a tuner, giving them your car and engine specs.
