Quote:
Originally Posted by asshanson
Probably not an O2 sensor if both are reading lean. Your fuel trims are maxed out on the positive side right, it can't add any more?
I would guess this is an air metering problem if your fuel pressure at the rail is good. Maybe an air leak pre-turbo but after the air sensor? Have you gone into boost? If it goes super rich under boost you may have a massive air leak somewhere, letting in extra air under vacuum and letting out air under boost.
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12.5% is the max for Long term fuel trims. however you can get more added through short term fuel trim. They add, so if LTFT is 12.5 and STFT is 10 then I get 22.5...not sure on max STFT though.
I found out the lean code comes from a maxed fuel trim, so until I get that resolved it will keep popping up. I am guessing the other codes are tied to the "lean" factor as well because they are new with the pump gas map.
I am going to add 10% MAF tonight to richen it up and see what that does. If that works then its probably a combination of more MAF scaling needed and the fact E85 was still left in there.
I shouldn't have any leaks. We checked for exhaust leaks at MAP like two weeks ago on the lift, didn't see anything. Also we boost leak tested everything at the intake and found one leak that I have since fixed so that should be good. MAP did obviously have a ton of stuff off for the head work they did so I am guessing everything got replaced correctly.
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