2011 6.7 misfire cylinder 5

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Aug 11, 2020 | 01:29 PM

fordboy2

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From: freeland, mi

2011 6.7 misfire cylinder 5

Looking at a early 2011 with 110,000 miles. It is deleted and has a misfire on cylinder 5. Dealer put a new injector in it and didn’t clear. So currently they unplugged number five to keep it from smoking. This concerns me a little too because obviously nothing is firing but I also assume there’s no fuel being dumped if the injector is unplugged??? What are possible cause of this? I’ve seen where the valves can cause this when in regen, but obviously this trucks not in regen. It’s a pretty decent deal and I think I can still get them to cheaper yet, but just wondering what kind of can of mess I might be looking at. Thanks for the input.

Aug 11, 2020 | 08:19 PM

farmert

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From: western SD

Did they reprogram the new injector to the truck? It is my understanding the new injector has to be programed into the truck ECM. Someone with more knowledge will probably chime in.

Aug 12, 2020 | 05:25 AM

senix

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From: Frederick, MD

this is concerning why cant the dealer fix it. This is not a ford dealership? Is this truck deleted?

Aug 12, 2020 | 06:54 AM

fordboy2

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From: freeland, mi

It is deleted, no it’s not a ford dealership. Just small mom and pop dealership with a in house mechanic with limited diesel experience.

Aug 12, 2020 | 12:31 PM

senix

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From: Frederick, MD

well I guess they need to take where it can be fixed.

Aug 15, 2020 | 02:44 PM

fordboy2

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From: freeland, mi

I wouldn’t disagree with this, that’s what kinda scares me is why would they sell it as cheap as I’m able to buy it instead of just paying someone to fix it. The dealer has been around forever and has a good reputation so that helps the thought that they’re not trying to pull a fast one but still.

Aug 16, 2020 | 04:02 PM

F350 1990

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From: Mooresville, NC

Any number of causes (in addition to the injector) @ that cyl including low compression (mechanical), gasket problem, ECM (injector piezo stack charging), harness, etc.

As for regen, some dilution is normal (DPF equipped engines) and regen will cause some fuel to leak past the pistons rings and into the oil...........that's why you follow the OEM's recommended oil change interval....

What brand of injector was used as replacement and did they run a power bal test?