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Old 09-01-2025, 01:23 AM   #1
Oxyg3n
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Misfire after switching back to stock tune.

Wanted to post this here too as the tuning section doesn't seem to be very active and this is also related to the engine.

So, I've been on an OFT tune for awhile and just swapped my stock headers back onto the car. So I went ahead and flashed the stock tune back on the car, and here's the kicker, I had e85 in the gas tank and tried to start the car with the stock tune. The car started, but quickly died. (I know this was stupid, but it's already happened and I've since filled up with 91)

My live readings are now showing misfires on cylinder 2 and adv. multplier of 0 with the stock tune. Now, I went ahead and flashed back to a 91 octane OFT tune, and misfire readings are all back to zero and everything else normal.

So I went ahead and flashed the stock tune again, but the car still has the misfire readings and 0 adv multplier in its memory. Started her up, and still, the same issues. Don't really hear anything wrong though. Would I have corrupted my stock tune file or something when the car died instantly after the flash, not letting it "learn" for a minute like the tablet instructs after flashing? I'm not sure why it's only misfiring when on the stock tune and not the OFT one? Any feedback would be much appreciated.

Stock Tune:
[IMG][/IMG]

OFT 91 Octane Tune:
[IMG][/IMG]
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