maybe i can figure something out or at least figure out what the hell the noise is.

 

Its your little weak 4.8 trying to move that big truck. LOL

Mine is running AWSOME. I ran John today in my old Camaro and we were side by side. He couldnt pull on me and i couldnt pull on him. Tell Ozzy to bring it on, because I'm going to hand him his ***.

As far as that noise your truck is making, I think it could be the injectors dumping a ton of fuel when you first tap on it. It sure sounds like real knock, but just for a second.

 

Your descreened maf could be causing a problem by giving incorrect load readings.

 

Ive got a similar sound and problems with tuning and KR I really noticed it at idle when I got under the truck (when it lopes alot). Im almost certain its from shody exhaust work, Im fixing it with my headers and ofr y install. Grab hold of the exhaust under the truck and shake it see if you hear anything, do it when its cold . If you dont at least you eliminated one thing.

 

He has all stock exhaust exept for a single peice of 3" pipe in place of the muffler i gave him. The sound is more like a clatter for a split second when you first tap the gas. After that there's no strange sounds. As for the KR, when i tuned the truck i was pretty aggressive with the timing, so if you have bad fuel now, or since the temps are 40* warmer now that may cause the KR. Lets try some good gas with maybe a little booster and we'll see if the KR goes away. If not it may be false and we need to find out why.

 

well i pulled alot of timming from those spots where i seen the kr from the datalog. and it still done it. it just started making that noise in arkansas not long after that long *** trip. but it didn't seem to change in performance any.