Injection problems

[jobob307]

My 98 3500 with 40,000 miles started acting up. It has a check engine light and is giving the code 275. Which is something to do with the pump and timing. Has anyone else had this problem and what is the solution?

[jobob307]

And I should mention that at idle and WOT engine sounds normal any thing else it knocks from one cylinder pretty bad. And I have had nothing but fuel delivery problems with this truck. GM's dual tank fuel control box was their worst idea ever.

[Chevylover]

P0275 - Cylinder 5 Contribution/Balance Fault

If you mention, that it knocks from one cylinder pretty bad, i would assume, that you got a bigger problem. Piston slap, piston rings, melted piston, pissing injector or something else ?

Hope this helps !


Cu,
Sven

[torque454]

My 96 had one cylinder that knocked louder than the rest..... when the injection pump was replaced that noise dissappeared. It also had an SES light on i think and would stumble around a corner. It was wierd. But all those problems dissappeared with a new injecton pump.

[murd450]

we had a van whith the same problem and it turned out that it swolowed a valve:eek: