What else could cause knock if my o2's are in the low to mid 800's. My o2's at wide open throttle are around 810-825. I am still getting knock somtimes. Somtimes i will get 1-6 degree of knock. My car is stock except for fuel pump, valve springs, and power plate. If it is not false knock, what else would cause knock under a some what rich condition?
THANKS
Joe Miller
THANKS
Joe Miller