mrm95

iTrader: (1)

So the other day when we were doing a compression test on my car the check engine light started flashing as we were going WOT while cranking the car over to do the compression check... Anyways, ive only been tuned on a single e85 map but i am on tephramod so there is automatically a lower octane map right? anyways, when i was doing a few pulls tonight i noticed that my AFR's were lean (12.5-12.8) when normally they are 11.9-12.2. Im worried that i accidentally switched over to the low octane map without knowing.. The boost levels are still the same (30 psi). Anyone know what may be going on? I would really rather not melt my pistons running lean because of something stupid like this. I noticed that when i pulled my map from my ecu to disable EGR that there was already maps for the low octane. Thanks everyone!

robbyredneck

iTrader: (3)

is your low octane map richer than your high octane? it should be.

mrm95

iTrader: (1)

Lol i figured it out. car is running fine. but since the injector duty cycle is lower on the low octane map it will cause you to run lean with E85 in the tank

robbyredneck

iTrader: (3)

so your alt map is the e85 and primary is gas? interesting caveat.

mrm95

iTrader: (1)

Primary is E85 and thats the only map/fuel ive ran since Sept 2013 when i converted to E85 haha