Quote:
Originally Posted by bishopts
MAF failure without codes is pretty rare. In fact. Ive never replaced a MAF without an accompanying code. I would look harder at other things.
Fuel in the oil from the high pressure pump leaking into the crankcase,
Restrictive air filter,
Repeatedly shutting off the engine before operating temperature,
Fuel quality,
Worn spark plugs.
Im a diag tech by trade. Throwing parts at the problem without actually testing anything is literally the last thing i would do.
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All fair points. If you take a look at the values I have from the HP tuner file you will have a better idea why I threw parts like a MAF sensor at the car. The MAF is reading is high for 600 rpm and the fuel trim is off. Car has 50k but I have spark plugs and wires on hand due to many track days and noticing this stumble/misfire previously. BTW misfire count on cylinders 6,7,8 are all under 10.
Edit fuel quality is top tier premium.
Car is never run for short periods before up to operating temp of 180 or so
Air filter is rotofab cold air intake, non oiled.
Edit 2 have had 2 samples sent to Blackstone for analysis and neither have been anything other than acceptable, no mention of fuel in oil. (I do this with all my vehicles routinely fort good meausre)