Quote:
Originally Posted by Wepeel
Somewhere it was stated they drove around for a week with the mod then dyno'd it. So it would give the ECU time to learn out any sudden changes that would affect the AFR. At least to what is in range or the fuel trim authority.
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That's not what the ECU's autotune is for, though. Autotune is there to save the engine! When it pulls timing and alters trims, it does so drastically, as an inbetween between blowing up and limp-mode. Like, if the knock really only needs about .2 degrees of timing pulled to tune it out in a certain RPM range, Autotune will pull a full degree, because it's about engine safety, not proper tuning.
So, relying on autotune to fix the problem is just a bad, bad, bad idea all around. You fix the IAMs at 1, THEN dyno with the mods and see where fine knock learning, IAMs, etc go from there... fix, and repeat till IAMs, etc. show there's no knock under the conditions you're testing.