Quote:
Originally Posted by BabyDiesel
The setup is a wire soldered into the MAF->PCM wire. This goes into a pentimometer, dividing voltage and sending part of it to a ground. The rest is what the PCM sees. So the PCM sees less MAF voltage than there actually is.
The strange thing is that after 10 minutes or so, the PCM will go into Open Loop. Power will drop off even more, and my mpg goes down quite a bit. The car is more finicky during OL, as in it does not like as much throttle as it does in CL before knocking.
I'm unsure what A/F ratios I am running. All I know is my short term fuel trims are maxxed out at +32%.
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OK I see whats going on now. So the PCM is thinking the MAF single is write based on the tweaked voltage etc. The O2 sensor is showing lean and the PCM increases the injector pluse width based on STFT at 32% which is max. Did the LTFT ever kick in? I guess it didn't because you would see the STFT go more towards 0.