Thread: Unplugged my MAF and still running lean???

Originally Posted by DoubleBlown

lean is positive = pcm tryin to add fuel to compensate
rich is negative = pcm tryin to pull fuel to compensate

So, this is what I thought and puts me back to square one. I thought the engine would run rich with a MAF failure (or disconnect). Right now, MAF disconnected, LTFT running positive 2-5 at idle and up to 9-10 with moderate driving. Using "Jerry's handbook" VE tune methodology I thought I would be getting negative numbers and trying to lock those down between 0 and -3 when PE mode kicks in.

With the LTFT so far in the positive, how do I flip that around? Please show me if a better tuning (DHP) guide if one exist but I have been using Jerry's guide for my NA motor until the parts are on order and ready to swap. TIA