Knocking noise

[drocker]

I got a noise that I tell if it is a rocker or sticking injector. Only hear it at idle and it seams to go away as you throttle up. Cant hear it while in the cab or driving down the road. Listen and let me know what you think. Injectors and glows I am pretty sure have 150,000 miles on them and that is how many miles are on the yukon. You can hear it through the whole video but at 31 seconds on you can really hear it.

 

[jhornsby3]

That is what my injectors sounded like before I changed them. Just a random ticking that went away when throttled up. MIne had 181k on them so they had to be changed. another thing I found, by way of another on this forum, is the cover over the back of the turbo can rattle and cause that same ticking.

John

 

[vail426]

Cover the Turbo shield with a bath towel for a few seconds and see if that cancels the noise. If it does, that is what John is talking about. If it is the "chink chink" noise I hear that is what it is. Kinda common with these trucks....