Looking for some thoughts on a 2017 C7Z that was brought in with "low on power" issues. Apparently the dealer replaced knock sensors and the ECU due to CELs while under warranty. What I'm seeing is that under load, the engine is pulling between 6-8 degrees of timing steady throughout the pull. I verified fuel is good with a wideband. Vehicle is completely stock. I added 5 gallons of 100 octane thinking it may be a bad gas situation - no change. I pulled plugs on DS bank, they all looked OK. I can periodically get it to throw a P0325.
Below is a log of what I'm seeing. Seeing it pull timing across all cylinders. Actually recording knock on pistons from each bank.
'Any thoughts on what may cause a completely stock car to have this kind of issue?
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RUN_KR4.hpl