5.3l 4l60e issues NEED HELP!

[BR3W CITY]

Originally Posted by chevyman70

could be MAF but it could also be something in your tune.

will it idle at +/- 5 with the MAF unplugged?

I had the PCM reflashed to see if it had anything to do with the tranny shifting erratically. When I unplugg the MAF, it idles okay. What do you mean +\- 5?

LTFT %

If it idles better unplugged, that means the VE tables being used are at least "ok". That points back in the direction of the MAF or its related wiring. While its possible there is a tune issue, I don't want to suggest that if there is a diagnosable MAF failure.

If I need to test a MAF, I call in a favor at the parts store and grab another brand new maf. Clear codes (or pull battery), connect the new maf, let it idle up and see if any of the problems self-clear. If so, you can either keep the new MAF, or return it and find a junkyard/used replacement. A little ghetto, but works when you don't have easy access to a salvage yard on a weekend.