Im a little confused here. (Im guessing I should get a new knock sensor? or getting this product from DEI I belive that goes wrapped around the knock sensor to block out any exterior false knock) I have heads/cam/TB/ Roller Rockers/ LT4 knock module/LTs x pipe/ maganaflow mufflers dummped at the rear by the bumper. I logged my car lastnight at the track when I was doing some passes. First run no knock retard, second run knock retard as high as 6 degrees in the 5000 rpm then like 4 and 2 from 3k-45k (thats thru first gear) second gear no knock retard. did another pass after backing off timing same thing keeps happeing . I am running 93 Unless Shell is ripping people off lol.
What could be the problem? Thanks guys

 

srry the product is not from DEI its from Dynamat

 

Is knock count incrementing when the PCM is pulling timing ? If not could be burst knock or the PCM remembering old knock conditions and pulling timing to avoid it. In MOST instances if knock stays after pulling 5-8 degrees of timing at the RPM/MAP conditions that fail (as a test) is not real pre-detonation. Also if knock count bumps under low to now loads (low Kpa) it's not real. It gets tough to insure it's pre-detonation or just plain something vibrating.

 

Yea i just checked and knock count increased