Hello folks,
I've been having what felt like violent "stuttering" when at high RPMs (above 6K) accelerating which is easily reproducable. I was at VIR last weekend and was able to log some data on my AEM while on track. I have a 2.oL motor with crower rods and pistons, HKS 272 cams. Just looking over the log file, looks like timing is being pulled when knock sensor voltage spikes.

I'm new to this car and this motor and AEM so if anyone can help me take a look at my log file and help assess the problem, I would be greatly appreciative.

PM me your email address and I'll forward it over. It runs 93 octane and I added about 5 gallons of 100 octane to see if that helped but it didn't. What was interesting was the stuttering seem to go away as the engine really heated up and into my 7-8th laps. Heard of similar issues with built motors and "phantom knocks".

TIA.

 

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