[Trugambizzi]

HELP!!!02 GMC 2500 HD LB7. 4x4. Very well maintained. Intermittent fuel knock.

 

[OkDually]

Welcome to DieselPlace
I moved your post over to its own thread for better views and responses to your issue.

:thumb:

 

[Rvn4me]

Normally fuel knock is associated with bad injector/injectors.
Any way to do a injector balance rate test?
As you read some people put this in or some other lubricant.
Super Tech brand of TC-W3 2-stroke from Wal-Mart.
https://www.dieselplace.com/forum/6...1-2004-lb7/213375-fuel-knock-please-help.html
https://www.dieselplace.com/forum/6...-2001-2004-lb7/707801-injector-knock-lb7.html
https://www.dieselplace.com/forum/6...-2004-lb7/610209-low-fuel-pressure-knock.html
https://www.dieselplace.com/forum/6...004-lb7/463647-injector-knock-tons-smoke.html
https://www.dieselplace.com/forum/6...004-lb7/433693-03-duramax-knocking-sound.html

 

[Trugambizzi]

The injectors are newer. Less than 4K.

I’m really starting to think that the fuel filter could be bad, and a combination of getting a very high sulfur diesel fuel content from some **** gas station by my house

 

[Rvn4me]

The injectors are newer. Less than 4K.

I’m really starting to think that the fuel filter could be bad, and a combination of getting a very high sulfur diesel fuel content from some **** gas station by my house

Let use know what you find out.