Quote:
Originally Posted by sly
Is there anything else non-stock on the car? Your fuel trims on stock are showing a correction where the 91 tune is closer to 0. So something is causing your trims to adjust one the stock tune, indicating that something on the engine is not behaving stock. If this is at idle, you engine vacuum is also higher with the 91 tune, indicating that that tune is more what your engine is wanting...
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I find that the fuel trims could fluctuate a bit. I just swapped back to my stock headers, so everything is stock other than my Perrin catback. When I got my stock headers removed, the installer did say one of the OE sensors felt seized when he tried to remove it. Would a leak at the sensor cause misfires?
My theory is that the stock tune read misfires when I tried to startup the car with stock tune + e85 in the tank, and now it's in the memory and I don't know how to reset it.