I just scanned my truck and it shows that right after my truck shifts into second gear that it has 7 deg. of KR which I know is not good. I have checked for noises and I cant find anything wrong. Any help would be great. Thanks, Brad

 

maybe it will go away with some better gas. if not call your tuner

 

Are you still useing the 00 PCM? If so, Switch to an 02 PCM and this will solve the kr issue. 99-00 PCM's are known for false knock issues.

 

Do you hear any detonation? I know my 98 Z28 used to get false knock due to loud as hell exhaust. Do like he said and run some good gas and I know some tuners desensitize them which is a no no.

 

Thanks for the replys, I do not think it is the gas because I only use Marathon 93 octane. I am thinking the problem is the pcm, I am in the process of getting a Brand New 2002 pcm and hopefully that will fix my problems.

 

If I change to a 2002 pcm will I have to change the fuel injectors?

 

No, they will be fine.

 

soon as i did the cam install and springs on mine it started pulling KR and i was like wtf


during tunning we starting turning the KR down and never heard and detonation on it so we left it pulling at least 2* until i can figure it out

so does any one know more info on the 99-00 pcm's and why they do that

 

The only problem I had is the flashing battery light and dtc code "Generator Terminal F circuit". But your tuner can diable this code. or you can do this https://www.performancetrucks.net/fo...ight=generator

 

I just thought I would post my scan (below) when I noticed the knock retard even though I figured out what the problem is. Thanks

Scan