PCM Drivability problems
I'm having problems with my 07 sierra classic , for a while now I've been hunting to solve my P0101 problem, I have the GM service manual and followed the flow chart and still haven't been able to resolve the check engine light related to this code (P0101). I have replace just about every thing imaginable; MAF sensor 4 times (all new AC Delco) New Ac delco MAP sensor, new intake manifold and gaskets , new paper air filter, checked all hoses/intake tubes for cracks and vacuum leaks on the engine. Nothing seems to work.. after some reading, I was thinking that the PCM may be having problems because I found out recently that my cooling fans for the A/C do not turn on when I turn the switch on the dash to the on position. Just a thought that the PCM could be the culprit , So I decided to check the connection on the pcm, after disconnecting the battery and removing the PCM I check the pins for corrosion and everything appears okay. After reinstalling the PCM and hooking the battery back up , I ran some errands and had no problems. On my way home the truck began to have a crazy shift pattern and the engine would cut out briefly as if it had a electrical problem and come back on, this got worse the closer I got to home with the dash lights dimming and engine surging/cutting out that was taking place. Furstrated and tired I waited till today to look at it again and took a log of it doing the same thing again. There are brief spikes where the rpm's drop but the throttle remains constant. Any one experience this before? Thanks
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