I have a 2002 Chevrolet 2500 with an LB7,
I replaced the injectors and cups, it idles fine, gets up to temp with no issue, even drives ok, until hard acceleration.
After a hard acceleration begins knocking and producing thick black smoke, if I shut it off and restart it it runs fine again.
I performed a cylinder balance test and monitored injector balance rates during the concern, the contribution was equal and roughly matched idle rpm, the balance rates on all 8 cylinders were in the +/- 6-8 range engine warm, but once I shut it off and restart it they go back down to +/- 4.0 range. I don't see any fuel leaks, or notice any fuel in the oil, I replaced the fuel filter and primed the system before even attempting to start it. I purchased the injector super duper kit from Diesel Logic.
I replaced the injectors and cups, it idles fine, gets up to temp with no issue, even drives ok, until hard acceleration.
After a hard acceleration begins knocking and producing thick black smoke, if I shut it off and restart it it runs fine again.
I performed a cylinder balance test and monitored injector balance rates during the concern, the contribution was equal and roughly matched idle rpm, the balance rates on all 8 cylinders were in the +/- 6-8 range engine warm, but once I shut it off and restart it they go back down to +/- 4.0 range. I don't see any fuel leaks, or notice any fuel in the oil, I replaced the fuel filter and primed the system before even attempting to start it. I purchased the injector super duper kit from Diesel Logic.