2006 6.0 with a P0279 code. I’m fairly mechanically inclined so I started off with some diagnostics to find out where my issue was. I tested resistance on my injector harness on pins 3 and 17, then 8 and 18. Multimeter showed I had an open circuit on one of two tests so I went ahead and replaced the harness. Still the same code/misfire. Swapped with a good known ficm… same code/misfire. Then I plugged in a good known injector just for ease of mind even though the coils tested out good on the original injector and still had the misfire and code. I actually changed that injector out for a different one again and it was the same thing… what am I missing here??
A special P0279
- Thread starter Lucasz514
- Start date
Powerstroke Cowboy
Well-known member
First off, Welcome to PSA.
It could be the PCM is bad.
Have you checked the wire harness all the way to the Injector?
To start with, which injector was it you changed? Actual physical location.
Do all the injectors buzz on a buzz test?
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Changed number 7. Furthest back on passenger side. Only #7 fails a buzz test
Ok. The injector harness you changed, was it a new harness or a known good harness?
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Brand new. I’m about to get home here and I’m gonna ohm test this new harness just because
Make sure the injector is fully clicked in as well. Sometimes they can be a **** and you have to press the clip in while you’re putting it on the injector to get it to fully seat
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