Quote:
Originally Posted by Myaddiction
In a X6/5M? How much is he running? Does he have a tune? If the long term fuel trims go over 20% the ECU will trigger a "to lean" fault. The air fuel ratio is fine but the ECU doesn't understand why it takes the extra volume of fuel to meet the AFR targets. It is because you need @30% more volume with ethanol to meet the AFR targets.
I've seen it numerous times on the stock tune when I add to much E85 in the mix. No impact to the motor.
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What kind of AFR are you getting with your current mix of E85 and pump 91 oct
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2016 X5M
JB4, DME Tune, Full Custom Fab Worx Exhaust w/ Straight Pipes and Cutouts, KW V3, 22" BC Forged Wheels, Brembo BBK on all 4 corners