Not so much a tuning question, but a pcm question nonetheless...The other day my sub box slid back from an aggressive dwnshift that tore out my pwr cable (0awg) from my amp. It was a 3rd-1st-3rd WOT, and when it shifted up to 3rd it was quite firm, almost a slam... Ever since its been upshifting early and not quite as firm as should be. Doing 55 Im turning 1200 rpm. I thought maybe a input/output sensor was bad, but scanned it and found nothing. Wasn't sure, as I still have a bad rear o2 sensor.
I've been ignoring it, but it almost seems its somewhat back to normal (still seems to labor more then it should, and shifts are still a lil soft). Im wondering if the pwr cable had a voltage spike that some how glitched the pcm, and its now slowly re-learning the shift points. That or I've gottn used to it. I was knockn at full tilt when it happened, so there was a serious drain on the alt (AD244 140a).
Originally Posted by frosty
