|
|
05-06-2021
and it wont damage the cat. the PCM is correcting the hardwritten tables by removing fuel (it will go to 44% change after it hits the 22% "wall" for long enough) to keep the mixture at stoiciometric.
keep in mind that the TPC/MAP(and baro)/MAF and O2 are "trusted" sensors, so the pcm ASSuMEs they are correct even when they may be skewed by age/contamination.
the O2 is the primary datapoint for trims....so make sure its good.
05-07-2021
Thanks for the advise. It's all AC Delco sensors with NGK plugs on a stock tune. It was running rich before and after the sensors were replaced so I don't think it's related to one of the sensors. I didn't notice any exhaust leaks but I'm going to pull the front P log and inspect it for any cracks since those were a bit notorious for cracking at the welds.
| « Previous Thread | Next Thread » |
| Tags for this Thread |
| Bookmarks |
Bookmarks |
