Have any of you guys had problems with KR with a cammed, fbo truck?

Was looking at a truck that had KR everywhere on a stock timing table. I checked for any rattling of the exhaust but no dice, is it notorious for trucks to pull timing when a noisy am is installed? Never seen anything like it...

 

Post a log, tune. What motor? More details..

 

Pretty much summed it up.
I desensitized my Knock sensors after i put the cam in mine.

 

It needs to be fully investigated, but false knock is a bitch.

 

Mine false knocked with just a cam/spring swap with the stock timing table. I pulled 5-10 deg of timing from the problem areas, and went from 87 to 91 octane and it still did it. Didn't make the pinging sound either so I was pretty certain it was false. It was only in the 1500-2000 RPM range at low-mid TP.

 

If its a 1999-2001ish then upgrading to the 2002 OS will help. 12212156 is the OS your looking for.

 

So you guys do reduce the sensitivity. I worked on two heavy cammed trucks and they were getting ridiculous KR on the stock timing. What timin do you guys usually run on say a 228/228 112 lsa lq4? I was commanding around 24 degrees WOT and i was getting knock, so i brought it down to like 10 and it still registers as knock.

My stuff was stolen but i managed to get a log i had saved and the file

 

what year are they? I dont have HPT to check them.
It could possibly be bad knock sensors also.

 

It is an 04 lq4, you think running little timing might cause knock

 

Ive never seen that before.


My Tahoe pulls alot of timing but it has a couple codes set for the knock sensors. So i gott get to changing them.