I really do appreciate you all. Been a member for a while now and I always get good info and help. Hope I can pay it forward to someone else. Hopefully this thread with an eventual conclusion will save someone money and time in the future. Night all.
6.7 Powerstroke Diesel Injectors failing at low mileage?
- Thread starter mbacfp
- Start date
I hope the tech is happy to listen and responds with the answers to matts questions.
If they come up with nothing as far as any other electrical diagnostics, I would suggest pulling the VCV and PCV to make sure the CP4 is not starting to come apart. It would be unusual to set these “injector performance” codes for that but on very rare occasion I have seen it (even though it is an electrically based code as far as troubleshooting )
Thanks and will do.
Hoping an injector on bank 5-6-7-8 that is having low resistance, etc. at startup and computer isn't able to accurately and consistently locate it. First was P1558, then P1555, plus I've seen 2 codes P1555 & P1558 and P1555 & P1556. But, who knows. Service advisor said Ford is having them run tests that are not in the service manual (whatever that means).
Have a great Monday everyone.
Update:
They did their tests per Ford Engineering. I have been mentioning multiple codes beyond P1555, including both P1558 & P1556 (recently after battery change). Service advisor said they have been only chasing P1555.
All tests came back normal and tech did see P1556 and changed injector #6. All is good...no more codes. Service advisor said won't ask me for anymore money until we know it is fixed. Yeah right...
Kinda of satisfying as service advisor kept dismissing that theory of PCM not finding right injector saying individually wired, etc.
Kind of pissed me off saying he won't ask me for more money? Diagnostic fee and new injector #6 isn’t anywhere near $2,000.
He is going to send me the bill detailing what I am paying for.
Don't necessarily want to burn them, but after Ford not caring about my 3rd upper oil pan repair bill...Ford can go...
Will drive over the next couple of days to confirm...but hopeful this is it.
They did their tests per Ford Engineering. I have been mentioning multiple codes beyond P1555, including both P1558 & P1556 (recently after battery change). Service advisor said they have been only chasing P1555.
All tests came back normal and tech did see P1556 and changed injector #6. All is good...no more codes. Service advisor said won't ask me for anymore money until we know it is fixed. Yeah right...
Kinda of satisfying as service advisor kept dismissing that theory of PCM not finding right injector saying individually wired, etc.
Kind of pissed me off saying he won't ask me for more money? Diagnostic fee and new injector #6 isn’t anywhere near $2,000.
He is going to send me the bill detailing what I am paying for.
Don't necessarily want to burn them, but after Ford not caring about my 3rd upper oil pan repair bill...Ford can go...
Will drive over the next couple of days to confirm...but hopeful this is it.
Keep us updated, the theory of components being individually wired to the ECU is short sighted as it’s not taking into account what happens inside the ECU.
I agree. Disappointed as I gave tech that information before hand. Special thanks to you for your help.
Very surprised Ford Engineering didn't confirm those tests were done as well before recommending wiring harness?
Will drive over the next couple of days to confirm. Make it a great day all.
Appreciate your experience and info.
Also worth noting...the independent diesel shop I went to initially to change out injector #5 (injector and pigtail) for P1555 apparently followed same logic to injector #5 and said PCM as well.
Felt more comfortable going to a Ford dealer before going down that road to confirm as I have no experience with local diesel shops around here.
I guess this sort of thing is rare and not observed very often?
Why would Ford Engineering throw a wiring harness without confirming individual injector resistances were checked?
Kinda of disappointed as these are big money items to repair. Will see what they say I owe them extra.
Will be fair and reasonable as I don't want bad karma. But certainly not going to get ripped off by Ford who could have cared less about my 3rd upper oil pan repair.
Hoping this will help save someone time and money in the future. We keep thread updated if anything comes back.
Felt more comfortable going to a Ford dealer before going down that road to confirm as I have no experience with local diesel shops around here.
I guess this sort of thing is rare and not observed very often?
Why would Ford Engineering throw a wiring harness without confirming individual injector resistances were checked?
Kinda of disappointed as these are big money items to repair. Will see what they say I owe them extra.
Will be fair and reasonable as I don't want bad karma. But certainly not going to get ripped off by Ford who could have cared less about my 3rd upper oil pan repair.
Hoping this will help save someone time and money in the future. We keep thread updated if anything comes back.
So, as far as I can tell. Had P1558, which Planet Ford changed injector #8. Then 3,500 miles later had P1555, which for now turns out to be injector #6. 2 out of 8 injectors went bad internally at 10 years and 49,000 miles?
For a couple of years now I've been using a battery tender and started using (only once) PowerService antigel diesel fuel Additive before the initial P1558 came up. Probably coincidence...but only used for one tank because I got concerned it caused an issue.
Seems weird to have 2 go bad without any performance issues? Maybe battery tender? Will make a better effort to drive every couple weeks and keep battery tenders at a minimum?
Random thoughts...night all.
For a couple of years now I've been using a battery tender and started using (only once) PowerService antigel diesel fuel Additive before the initial P1558 came up. Probably coincidence...but only used for one tank because I got concerned it caused an issue.
Seems weird to have 2 go bad without any performance issues? Maybe battery tender? Will make a better effort to drive every couple weeks and keep battery tenders at a minimum?
Random thoughts...night all.
Use hot shots EDT for a fuel additive. Optilube a close second.
How much current is your battery tender putting out? It can occasionally happen with injectors going bad. Diesels don’t like to sit. They like to work. Not just speaking for a 6.7 powerstroke. Tough to work around that with an RV. JMO.
Been using Archoil. I'll look into the battery tender and report back. Just trying to figure out the why if at all possible. All it's life it has been driven at least every 2 weeks. Last 3 years, since I moved, have had it in storage and regrettably there has been months not driven. Also, colder winters here so used antigel and battery tenders (which never used before). Issues happened since doing new things but could be age...weird 2 injectors had internal electrical failures though...thus why asking. Will drive today and report back on battery tender.
Have a great day.
Appreciate it. Have a wonderful day.
Think 23+ PSDs have the 9th injector.
They do.
Personally I think the batteries being disconnected rather than replaced led to the change in fault code from injector 5 to 6. The time to replace the batteries has given the engine ECU a long power down.
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