Quote:
Originally Posted by King Tut
How do you determine that these are real knock events and not phantom knock?
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It doesn't matter if it's phantom knock or real knock, since the ECU is applying self preservation tactics anyway. As a result, the car will feel like it's stuttering, hesitating, bucking. Regardless of real or not, the ECU "hears" more things happening and takes preemptive measures to mitigate the possibility. The lower octane fuel, and who knows if there are any weird blends or oxygenation that is in the gas, will inherently be less stable at higher chamber pressures. At this point, I am assuming that the motor is octane limited; smart tuners please refute me.
Paul, does the ignition advance multiplier go beyond 1.0? If I was tuned for 91 octane, then moved to an area with 93 octane, will the ECU adapt to the higher octane?
budi