2002 silverado with following mods: K&N fipk, ASM headers, built trans, 4.10 gears, High flow cats, magnaflow 3" single in 2-2 1/2" out. was doing some logging today with autotap and heard some detonation, looked at the file and there it was. The only thing I have done with ls1 edit is deleted TQ management, setup for the current tires and gear size, tweaked the trans table some, and the IFR to get my ltfts negative, but nothing as far as raising or lowering the timing. I will email the autotap file to anyone that will take a shot at what is going on. thanks

 

My stock 02 will sometimes detonate on 93 gas. It would do it REALLY bad on 87. I have been suspecting that some 02 trucks have faulty knock sensors, or else they are just not as sensitive as other year models.

 

yeah, mine wont run on 87 or 89 without sounding like a marble machine gun, it does pretty good on 93 most of the time but there are some occurrences. Im really wanting to go ahead and get the radix supercharger this month, but I dont want this to be an issue. Anyone else have input. thanks

 

Sometimes you will just get some knock ...

Do you have headers? It may be something banging around, like headers banging the fram rail or something like that.

 

Wish we had 93 oct. here in california

 

with the way that gas prices and stuff are now, I doubt it is 93. Who knows what it is.