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66 Posts
Ok guys I need help!!! My truck has developed a LOUD knock under load .At around 1000-2000 rpm it sounds like its trying to throw a rod or something. When the truck is idling in netural or park and reved you don't hear a thing. No white smoke either. I just changed the fuel filter about 200 miles ago. I don't know if it's just a coincidence, but I just put a afe stage 2 on and a mbrp down pipe on.The down pipe clamp is tight and the exhaust is not hitting anything.I have search other post and it looks like I might be losing some injectors. I search for codes with my PPE and it found ( NO CODES) which I know is not right. I have 8800 miles on the truck. Any help would be appreciated. Jake