Reduced engine power
05-02-2006, 01:09 PM
#32
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Linda, I just saw this but I would still check your grounds, it initially (as I read through this) sounded like a ground problem but sounds like the PCM...
Good luck
Dave
Good luck
Dave
05-02-2006, 02:06 PM
#33
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Originally Posted by GMC_DUDE
Linda,
As an electrical engineer who works with engine controllers for a living (albeit diesel instead of gas) I can tell you with 100% confidence that the smaller pulley had NOTHING to do with the pcm getting fried.
It was merely a coincidence that the two happened together. Most likely there was either a manufacturing defect (I've seen it happen) or Westers touched one of the pins without grounding himself first, which caused a static spark and ESD damage, which typically shows up about 3-6 months later. Continue to enjoy your new pulley, get a tune, and make Westers give you a new pcm.
As an electrical engineer who works with engine controllers for a living (albeit diesel instead of gas) I can tell you with 100% confidence that the smaller pulley had NOTHING to do with the pcm getting fried.
It was merely a coincidence that the two happened together. Most likely there was either a manufacturing defect (I've seen it happen) or Westers touched one of the pins without grounding himself first, which caused a static spark and ESD damage, which typically shows up about 3-6 months later. Continue to enjoy your new pulley, get a tune, and make Westers give you a new pcm. Had I caught this earlier I would have suggested the PCM because I know that the recent addition of a blower or smaller pulley always results in a new tune. Most people will recieve a new (Used) PCM through mail order from a tuner. Most guys recycle PCM's so that would have been the most logical place to start. When changing out a PCM it is imperative that the battery be disconnected or the electronics in the PCM are subjected to stray voltage/cross voltage/insufficient grounds for a brief period.
With all this said, I am glad you got it figured out Linda. I too have had issues with my PCM, mostly due to low battery voltage while I am reflashing.
Good Luck.....
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