Changed both knock sensors today. The back one is a SOB but I'm persistent. Took it for a scanning run, and there is absolutely no improvement in KR. I'm getting up to 3.5* KR at WOT under 6 to 7 psi boost. The good news is with the BCS replaced I'm getting up to 9.5 psi boost.
I'm running 93 octane. I have tried 3 different types of gas over the last 6 weeks or so, all with the same results.
As mentioned, I replaced both knock sensors. No improvements.
Any suggestions as to where to go next? Could I be running lean? Should I check fuel trims?
2001 Bonneville SSEi (retired at 365,000 Kms.)
2014 Jeep Grand Cherokee Overland (yes, I know its not a GM)