[Reapur]

Hey there,

Ive noticed recently that under part throttle cylinder 4 has been pulling timing up to -10* at about 35% throttle. Im not sure where to start really at eliminating the problem.

I haven't really felt any major dip in performance but a recent log shows that @ WOT in 3rd gear the timing is being pulled from #4 up to -4* only on that cylinder.

All of the 5 remaining cylinders look clean all the way to redline with zero timing correction. Id like to get rid of the issue. Ive pulled the plug from #4 and it looks clean (NGK 1 step colder plugs). What should my next step be in troubleshooting this problem?