6.0 4l80e ccsb 4x4. I have replaced all knock sensors with new GM AcDelco units two times now, and the harness. Rang out the wiring and everything has been looking good. This truck is all stock, just ticked over 300,000 miles. I keep getting a pending knock sensor code, which was on during these logs, it always comes right back. Started logging right as the truck got to temp, and it seems like as the truck gets more heat, it starts throwing KR like crazy. Fueling and spark are stock, i have tweaked a few things in the tune, but nothing crazy. Stock spark and fuel... etc (PE was on and tuned with wideband, i reverted to stock fueling and spark for these logs)
I'm leaning toward this being the cats plugged up, but from what i can see on the back side they look clear and not plugged up. Does anyone else have thoughts on this? FWIW i bought this truck after it got flooded out by previous owner, replaced the engine, and the exhaust was full of water. I have been driving this for 50,000 miles after all of that never had one issue. Again, the cats look OK from the back side. Any help or thoughts would be appreciated. Thanks
2500 knock.hpl
gimmer stock fueling.hpt