So look I tune my car and that day we tune it to lets say 11.0 afr it will drove like that just fine but the next day car tune will change and the afr will lean out at top of rpm for instance 5k and up it will go to 14-15 afr lets say tune is fine what other reason could this be happening ? Bad maf? Bad fp? Not enough volts to fp? Maybe I should go back to stock pump or find another lq4 ive had different tuners mess woth this tune and same symptoms occur not sure how a tune can change on its own maybe bad pcm?