Hey guys been trying to figure out a noise I have I guess you could call it a knock it's been going on for about 4 months. It's more noticeable with the engine hot with a load on it at around the 1500 2000 rpm range it's most noticeable. It runs pently smooth and quiet at idle. And runs and drives just fine for the most part I will feel a small vibration at times under a load.iv been leaning towards a bad injector but just not sure. I don't believe it's anything more major then that but it still worries me. If anybody's had a similar problem or some input thanks