Sorry having trouble with forum on my phone. After making the engine run better I noticed the noise might go away at Highway speed. Doing anything else it might get quieter like slowing down (rpms dropping). The knock doesn't come from from or bottom of engine. It seems to be cylinder 3.if I Crack the injector it gets quieter but doesn't go away.
So I'm think it's in the valve train. Could it be a lifter? Can someone explain how the lifters work and why they would knock?


Using tapatalk. It's all new to me. My phone kept crashing while on website.