Rep Power: 902

I have done two WOT runs where the scanmaster has recorded a knock retard of 10 and 12 degrees. Other times whenever I take off from a stop the scanmaster starts to read a knock retard under very light throttle conditions and it goes up as I give the car more throttle (0.1 to about 1.8 degrees of retard). The odd thing is that some days the scanmaster will record 0 knock retard even under WOT. At first I thought it may be because the engine might be running to cold (160 T-Stat) but I know for a fact when the scanmaster recorded the 10 degrees of retard at WOT my LT1 was at operating temps. Any input on the subject would be appreciated.

Thanks

 
Rep Power: 910

get an LT4 knock module. if you have an exhaust leak or something that would cause it. or maybe youve got a bad knock sensor...

 
Rep Power: 866

yep. or just get the knock sensor programmed out of the PCM.

 
Rep Power: 829

Thats a little risky given the fact that GM tuned the LT1 pretty decent from the factory, there's a reason its there. Unless you are POSITIVE you are gettin false knock, I wouldn't unhook the sensor. But that's just me.

A loose rocker, exhaust leak, some aftermarket ignitions and such can cause false knock. It could always be your wires goin bad too- they start cross firing and you have true knock there, something that I would get fixed right away.

 
Rep Power: 910

wow youre dumb.

heh that seemed to be overlooked...maybe theres so much knock retard because there's really knocking.

 
Rep Power: 1069

I got bad gas recently in Mobile, maybe it made it over your way too