S/C owners: collecting information

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Originally Posted by whooppee777

my car runs fine under boost BUT when im cruising down the highway with the supercharger set at low(being the high setting) and the throttle is below 5%, meaning the supercharger is not engaged and i am not making boost, the car periodically seems to stutter and the a/f ratios go lean. im guessing this is preignition. this happens maybe once or twice every 10 minutes or so

now when i have the supercharger turned off this does not occur.

Preignition would be rich generally.