i have a pcm4less tune which seems fine and i've had good luck in the past.
i keep getting 4.0KR even at part throttle and it happens when the exhaust starts to get really loud.
i have cheap chinese headers and SLP loudmouth exhaust its extremely loud.
at wot it shows 20.5 adv with the 4.0KR. so 24.5adv max. doesn't seem like i should be getting any real knock especially running 92.
at part throttle i didnt record the actual adv but it still is pulling 4.0 right when the exhaust gets loud.
i put in brand new ac delco sensors and dorman harness. the sensors appear to be working just too sensitive? eventually i get codes for both sensors "low input"
i bought HPTUNERS and it will arrive tomorrow, i want to desensitize them and play around with it and see if i can get it to stop pulling timing.
24.5adv doesn't seem like it would even be a problem with 87 octane.
obviously i don't want to crack one of these HE pistons.
any advice?