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12-09-2012, 02:59 PM | #1 |
Scooby Newbie
Member#: 322645
Join Date: Jun 2012
Vehicle:2012 WRX |
Fueling issues with 2012 WRX on E85
Hi,
I have a 2012 WRX that I have some fueling issues with. Car is on E85. Mods are as follows. - Kinugawa td05 20g - Walbro 255 - FIC 900cc injectors - Catless DP - knock-off tmic - TP street tune One day the car started showing 10% to 25% fuel trims on cruise. Current map has been on the car for almost 10k miles. Took it to a local shop and they checked fuel pressure and did a smoke test. Found out I was losing the drivers side endtank on my IC. I needed a replacement and bought an E-bay special due to Christmas coming up. Yes I know the horror stories but I could not drop $800 on a brand name one a month before Christmas. Install went smooth but when I reset ECU the issues came back. Here is what I am seeing from logging. - very positive fuel trims at cruise that sometimes swing back negative - popping p2097 code post cat too rich - WOT A/F is pig rich. I have no idea how rich because its pegging the stock O2 at 11.02. - above 5800 rpms the A/F swings lean, very lean. Thank god for E85. No knock. - Getting misfire codes on start-up sometimes. The a/f is pegged as rich as it can go and you can smell the ethanol. It feels like so much fuel is being pushed its preventing proper combustion. No suprise on a 20 degree day here it started fine on one crank. Normal day or hot cranking it just feels like its flooding the engine. - I believe from the fuel pressure test that I was looking at 35psi idle and 57psi with the vacuum line to the FPR unplugged. So my question is what are the likely culprits? Does this ring a bell for any of you. I really don't understand the fuel trims going lean at cruise then pig rich under boost before going scary lean. Car drives like normal minus start ups. Idles fine. Similar Maf g/s as before. No knock. Any advice would be greatly appreciated. Thank you. Log below is from WOT pull. |
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