Injector Issues
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
Injector Issues
I recently got a P0263 on my 14 6.7. the truck was running fine for the most part with only occasional bogging and lacking power, usually when the trailer was hooked up,I plugged in ForScan and had a look at the injector balance values at an idle and then under load, Cylinder one would skyrocket when the engine was working. thinking bad injector I went and ordered a new one. It quickly got worse and worse while I was waiting on parts trying not to drive it unless absolutely necessary. The mileage tanked and it was doing its DPF cleaning on very frequent intervals. I finally popped the new injector in and reprogrammed the IQA value. I went and took it for a drive and no change, if anything it seems worse. it is knocking at an idle and seems to be making a slight whoofing through the airbox at idle as well. I'm thinking the worst, broken or bent intake valve. A friend found this TSB that I'd like to try before anything else. Anybody know how to run this in ForScan or if it's possible? Also can I do a relative compression test with ForScan? If so how?
Hotshot
Joined: Jul 2013
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I recently got a P0263 on my 14 6.7. the truck was running fine for the most part with only occasional bogging and lacking power, usually when the trailer was hooked up,I plugged in ForScan and had a look at the injector balance values at an idle and then under load, Cylinder one would skyrocket when the engine was working. thinking bad injector I went and ordered a new one. It quickly got worse and worse while I was waiting on parts trying not to drive it unless absolutely necessary. The mileage tanked and it was doing its DPF cleaning on very frequent intervals. I finally popped the new injector in and reprogrammed the IQA value. I went and took it for a drive and no change, if anything it seems worse. it is knocking at an idle and seems to be making a slight whoofing through the airbox at idle as well. I'm thinking the worst, broken or bent intake valve. A friend found this TSB that I'd like to try before anything else. Anybody know how to run this in ForScan or if it's possible? Also can I do a relative compression test with ForScan? If so how?
how will you try the TSB with out IDS software?
Thread Starter
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
To answer all the questions The truck and injectors have 380k kilometers on them or 236k miles. No reason to expect all 8 injectors failed at once with no warning signs, there is no metal in the fuel filters.
I am asking how to perform this TSB with ForScan instead of IDS as I obviously don't have access to IDS and I have been led to believe that ForScan is the be all and end all for Ford vehicles.
I am asking how to perform this TSB with ForScan instead of IDS as I obviously don't have access to IDS and I have been led to believe that ForScan is the be all and end all for Ford vehicles.
Former Vendor
Joined: Sep 2020
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From: Florence, MT
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
I brought my truck in and the dealer preformed the TSB, said the fuel knock is gone but the computer is showing slightly low contribution on cylinder 2 and 8. Told me to run injector cleaner in it and monitor for CEL. I haven't picked it up yet but I am hopeful. They checked compression and said that it was good so that is the one definite positive for me. I was quite concerned about that.
EDIT the dealer checked the relative compression.
EDIT the dealer checked the relative compression.
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Thread Starter
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
I just picked the truck up and it is running around like it always did, no vibration and the knocking has gone away now. I poured some injector cleaner in the tank. I wasn't really heavy on the accelerator but I gave it a few hard accelerations and the CEL popped back up. Still P0263. That is the cylinder with the new injector in it.
I have a disaster prevention kit to install on this truck so when I do that I'll be able to see for sure if my CP4 is dying or not, the filters were okay when I changed all of them. I am at a loss if the compression is good and the injector is new. Any more ideas here?
I have a disaster prevention kit to install on this truck so when I do that I'll be able to see for sure if my CP4 is dying or not, the filters were okay when I changed all of them. I am at a loss if the compression is good and the injector is new. Any more ideas here?
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
I programmed the new injector in. The tech double checked it when I brought it in. I mentioned the light coming back on to the Ford dealer and they said bring it back for another round of diagnostics at no charge. I got to talk to the tech and the shop manager this time and look it over on IDS with them. They both agreed that it appears that cylinder 8 is lacking and that the truck may not be smart enough and is trying to compensate on cylinder 1 since it is next in line. When I first pulled the codes ages ago it was cylinder 1 and 8 low on contribution but 8 never popped back up. I have a second injector here and will put it in cylinder 8 to see what goes on. They seem to think that it is definitely fuel related and nothing internal.
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
I will keep this updated to help anybody else in the future. I put a new injector in cylinder 8 with no success. Check engine light back on, vibration when working it and the check engine light back on. My new theory is that I have a bad lifter, bent push rod or loose rocker tower that is causing the intake valve not to open all the way on cylinder 1. this checks out with amount of soot that was on the cylinder 1 injector when I pulled it out and with why that cylinder is getting so much fuel and still not contributing evenly while still passing the relative compression check with flying colours.
Next week I will start to tear into this thing and get that valve cover off so that I can assess the damage. While I'm into it I'm going to put a new turbo on it as well. When I had the upper intake off for the disaster prevention kit install I noticed a surprising amount of play in the turbo shaft.
Next week I will start to tear into this thing and get that valve cover off so that I can assess the damage. While I'm into it I'm going to put a new turbo on it as well. When I had the upper intake off for the disaster prevention kit install I noticed a surprising amount of play in the turbo shaft.
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
I have the passenger side valve cover off. Every one of the long rocker arms has worn the bracket to the point where 2 have slipped off the top of the valve and the other 2 are right on the edge of slipping off. There is also what looks like the internals of one of the lifters up in the valve cover so I guess I'm pulling the head off too.
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Tuned
Joined: Feb 2020
Posts: 476
Likes: 91
From: Owen Sound Ontario
I have only owned the truck 25,000km. It currently has 385,000km. I have been changing it around the 10,000km mark.
As it turns out the intake lifter on cylinder 1 has spun 90 degrees in the bore. I haven't got the head off that side yet. I'm starting into the drivers side now. When I get the lifter out we'll see if the cam is any good or not.
As it turns out the intake lifter on cylinder 1 has spun 90 degrees in the bore. I haven't got the head off that side yet. I'm starting into the drivers side now. When I get the lifter out we'll see if the cam is any good or not.