Quote:
Originally Posted by CanadianZL1#992
So with a custom tune how does a fuse pull change the fuel tables
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Same as stock tune. The short answer is pulling the fuse resets everything. If your car has been having knock retard it will start using the low octane table. If it hasn't been experiencing a lot of knock retard pulling the fuse won't change squat. This goes for stock tune or custom tune. In all instances the PCM will return to the high octane table all by itself if you put better gas in the gas. It will take several miles though. And how fast it get's back to the high octane table depends on how far off it was before. If you use premium fuel all the time pulling the fuse is a complete waste of time.