Injector #1 Misfire, replaced but still throws code

[interwestmetals]

Threw two codes today (injector #1 misfire and cylinder #1 contribution/balance). Replaced injector #1. Still throws codes. Thinking about replacing the injector wiring harness, is there a way to test it if it's bad?

[wrench11]

If you had a wiring issue there would be a code for that, sounds like a mechanical issue to me.
Need to check the flow control valve in the common rail. If the valve malfunctions there will be a miss and imballance code.
One method of diagnosis would be to verify flow through the rail.

[fiderius22]

Subscribed. Cylinder 3 contribution/balance code was popping every once and awhile. Replaced injector, no codes for 2 months. Now I'm getting the same cyl. 3 contr./balance here and there again.... WTH:/


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[WoodBoy]

Any noises? Could have a bent lifter

[interwestmetals]

Replaced wiring harness. No dice.

Been only a month since replacing both fuel filters and oil change. About 117xxx on the clock, just fyi

Filled up the fuel bowl with sea foam to try to clean out system. Ran great for a week but today both codes came back and obvious misfire.

Not sure how to proceed.

[04hdfatboy]

If you are having a misfire i would guess an injector is hanging open.

[interwestmetals]

Originally Posted by 04hdfatboy

If you are having a misfire i would guess an injector is hanging open.

How would I go about fixing that? I already replaced the harness and the injector, is there anything else that would cause that?

[04hdfatboy]

Originally Posted by interwestmetals

How would I go about fixing that? I already replaced the harness and the injector, is there anything else that would cause that?

Damn bud i wish i knew. Is it throwing a code so you know which cylinder is misfiring?

[interwestmetals]

I'm thinking it might be EGR cooler. Blowing some white smoke and also I just read if the cooler blows it could simulate overfueling from coolant combustion.

Just some background. In the past, blown radiator, stuck egr valve, front timing chain cover cavitated and leaked coolant, and exhaust manifold cracked. This truck is driving me crazy.

[04hdfatboy]

Yep it very well could be that. It could be leaking coolant into the cylinder. Time to delete