Spark knock vg33er

[Superduperchargedvg]

Spark knock at 3k under boost( throttle) anyone else ever experienced this with a vg33er

[califrontya]

Yes, originally had this issue when i changed to a smaller pulley, and needed to step the plugs up to the next cooler heat range (7 for ngk). other than that, boost below 3k is hit or miss depending on if your ecu has gone open loop yet or not. I find mine to be unhappy below 2.6k. Check your o2 (fronts) to make sure they havent become slow to switch. I have to change mines out yearly.