Fueling issues with 2012 WRX on E85 - Page 2

dsm_luck · 12-13-2012, 08:19 PM

Quote:

Originally Posted by Elmerfudgeboost7

Subscribed! I hope you end up solving your problems with your A/F. Really interests me since i was planning on running E-85 on my 2012 from TP and i am not located far from you ( Cheyenne, WY).

I have ran nearly 20k on E85 and this is the first issue I have had. Its worth it for the power and this issue may in fact not be due to the ethanol. Just do it right (not like me) and get a wideband to monitor when you get tuned. I dynoed at 283whp and 336wtq on Boost Creeps dyno with just E85 and a tune. Its good stuff and even if my problem is ethanol related I wont be going back to gas.

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dsm_luck · 12-30-2012, 02:41 AM

Bump.

Been thinking about this for a while and I wonder if anyone can give me some advice on this.

I don't know if I stated it before but when the fuel trims went wack the first CEL I popped was a P0171 system too lean. Cleared it and then started popping a P2097 Post catalytic bank 1 too rich. I have also noticed that my MPG estimator on the dash has dropped about 4 to 5mpg from where it normally sits. Car smells like ethanol when idling. I know its unlikely that either of the 02s have gone bad but isn't that one of the indicators when popping conflicting CELS like that? If so how can I rule out bad 02s?

Tripintaz · 12-30-2012, 02:32 PM

replace your O2s and check for leaking exhaust gaskets off of your heads.

dsm_luck · 01-21-2013, 08:34 PM

Quote:

Originally Posted by Tripintaz

replace your O2s and check for leaking exhaust gaskets off of your heads.

It turns out to be the front O2. It was reporting that the car was running 2 points leaner than it actually was. Replaced O2. Trims look fine now. Need to run some logs in a bit to verify.

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12-30-2012, 02:41 AM	#27
dsm_luck Scooby Newbie Member#: 322645 Join Date: Jun 2012 Location: Broomfield, Colorado Vehicle: 2012 WRX	Bump. Been thinking about this for a while and I wonder if anyone can give me some advice on this. I don't know if I stated it before but when the fuel trims went wack the first CEL I popped was a P0171 system too lean. Cleared it and then started popping a P2097 Post catalytic bank 1 too rich. I have also noticed that my MPG estimator on the dash has dropped about 4 to 5mpg from where it normally sits. Car smells like ethanol when idling. I know its unlikely that either of the 02s have gone bad but isn't that one of the indicators when popping conflicting CELS like that? If so how can I rule out bad 02s?

12-30-2012, 02:32 PM	#28
Tripintaz Scooby Specialist Member#: 245218 Join Date: Apr 2010 Chapter/Region: South East Location: FL Vehicle: 2013 STI Limited Ice Silver	replace your O2s and check for leaking exhaust gaskets off of your heads.