I'm running my aem 30-0300 through pin 55 on my 411 pcm. I've noticed recently that the voltage in the egr pid is fluctuating alot. by 2 volts at times and it skewing my afr logs. I've checked voltage going into pcm from analog output of gauge, and its consistent, with maybe .02-.05 variation, figure that's due to afr fluctuation. I've attached a log of it doing it at idle, but does it throughout whole driving trip, even when at a steady speed/afr reading on highway. Ive tried another good know pcm to see if possibly pcm was bad but had same results. any suggestions? Thanks in advance for any input.
Yes. I forgot to mention, I had brown wire on pin 23 of blue connector which was egr ground originally. then i moved the ground directly to gauge ground, then finally to direct battery ground with no change at all. i did notice at first it doesn't do it then after a few minutes it will start the fluctuation.
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