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superdav · 05-01-2021, 11:00 AM

My wife has a 2018 Silverado that has started making a detonation/preignition knocking when going in and out of V4. Anybody got any tips on this other than delete AFM? I’ve tried high octane it helps but still does it.

05-01-2021, 11:00 AM	#1
superdav Registered User Join Date: May 2016 Location: Arkansas Posts: 200	V4 mode detonation My wife has a 2018 Silverado that has started making a detonation/preignition knocking when going in and out of V4. Anybody got any tips on this other than delete AFM? I’ve tried high octane it helps but still does it.