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Old 05-26-2021, 05:10 PM   #1
loki86
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Join Date: Jan 2020
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OFT E85 Fuel Trims?

I've been running the OFT e85 shelf tune for some time now and noticed my LTFT are always a little high at idle, hovering anywhere from +7% to 11% while on throttle it seems to be fine. Indicative of a possible leak, I've checked and found no issues, and switching to petrol tune the trims are perfect (0% at idle, never beyond +- 5).

When on e85 and coming to a braking stop, my car nearly stalls where rpms drop to ~600. Yesterday on a hot day and AC on, the car finally did stall. I also got a p0301 misfire CEL at some point. My fuel trims were hovering around 9% idle during this time.

Would anyone know why this is the case and what I can look into? Obv answer would be checking for leaks, but like I said exhaust components seemed fine and trims were good on regular petrol.
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