Originally Posted by Bert
How about the PCV Are there any exhaust leaks? How is the fuel pressure? Does it run good otherwise? What kind of driving did you do for the codes to come back?
I checked with carb cleaner for leaks. Kind of old fashioned way to do that, but I don't have real scanner to watch fuel trims. Didn't notice any idle change at all. I can't hear any exhaust leaks. It's not my truck, so I did not drive it at all, but the owner uses the truck just for normal street driving.
It runs fine, I am told. No stalls or stumbles. Started up and ran fine sitting in my driveway.
The codes came back within an hour after changing the MAF and clearing the PCM.