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11-09-2020
I am having issues with my fuel trims being off. There are no exhaust leaks, the o2 sensor is new, and I can not find a vacuum leak. The MAF is a “newer” Delphi. Probably about a year old. What am I missing? Maybe a bad MAF but the readings seem ok. I tried to tune the trims but they keep going off. They are all over the place. Any suggestions?
11-09-2020
They are off how?
Low or high?
Is fuel pressure good all the time?
11-10-2020
They are low and high. It fluctuates.
I have tested fuel pressure and it is good but I did not test it over a period of time. I am running an AEM high flow pump.
11-10-2020
I have an AC Delco Maf on order just in case. I will have to get some recent scans and figure out how to post them here.
11-10-2020
I cleaned off the MAF again and the trims seem to level out. I am thinking the METH injection may be messing with it. I adjusted the meth so it doesn't inject at a lower boost. So far it is running better.
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