Clay46
Registered User
I just put a new injection pump in and timed it, took it on a test drive and on the way back while I was coasting down a hill in 3rd gear I got a horrible engine knock for about a minute then went away mostly. I can still somewhat hear a knock at idle when I'm not in the truck, sounds like one of the rear 2 cylinders on the passenger side. I timed the pump to 9.5 degrees and it seemed pretty happy there. Just wondering if there is something other than internal engine components that could cause this knock, im fairly new to diesels. Though some research I think it might be an injector might have gotten some dirt in it but would like a second opinion. It sounded like a really loud hollow knock. Truck is a 84 f250 with a 6.9