Fuel line replacement now stalling
Lead Driver
Joined: Sep 2002
Posts: 9,524
Likes: 2,028
From: North Texas
Do you have any way to monitor the engine? My old Edge Insight does and does it great. We need to see ICP pressure and IPR duty cycle while cranking.
IPR wiring degrades often due to the Diesel fuel leaking on it. I would remove all that crap anyway and do a new pigtail, just so you know it is solid.
Buy or rent a hand held starter switch, hook to solenoid. Make sure truck is in neutral or park. Crank it and check fuel pressure. There are only a few things that keep these from running. We are talking early 90s or late 80s computers here.
I recall something about hard restarts when hot are related to injector o-rings.
IPR wiring degrades often due to the Diesel fuel leaking on it. I would remove all that crap anyway and do a new pigtail, just so you know it is solid.
Buy or rent a hand held starter switch, hook to solenoid. Make sure truck is in neutral or park. Crank it and check fuel pressure. There are only a few things that keep these from running. We are talking early 90s or late 80s computers here.
I recall something about hard restarts when hot are related to injector o-rings.
Lead Driver
Joined: Apr 2016
Posts: 7,196
Likes: 1,339
From: Bahstun
If it wont start with ICP unplugged and runs great when it does
low fuel pressure
injector top oring leaking
IPR tin nut loose
IPR wiring issue
IPR coil getting hot
IPR sticking when hot
HPOP when hot, leaks internally aka low pressure
low fuel pressure
injector top oring leaking
IPR tin nut loose
IPR wiring issue
IPR coil getting hot
IPR sticking when hot
HPOP when hot, leaks internally aka low pressure
Thread Starter
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Mountain Pass
Joined: Dec 2018
Posts: 127
Likes: 4
Wont start with the ICP unplugged either, I replaced that last year. Just check IPR nut, I took the whole valve out and cleaned it about a year ago. I’m onto either HPOP leak or low fuel pressure, but I do not have a way to test the fuel pressure
Thread Starter
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Mountain Pass
Joined: Dec 2018
Posts: 127
Likes: 4
Is the place to take fuel pressure right there on the side of the filter housing? Or is there a certain place to take the fuel pressure. I’m assuming I’ll have to have someone crank it while I read the fuel pressure? Also what is normal fuel pressure for these trucks?
Lead Driver
Joined: Sep 2002
Posts: 9,524
Likes: 2,028
From: North Texas
You should have a schrader valve on the fuel filter bowl assembly.
Two quarts low is not that bad.
Two quarts low is not that bad.
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Thread Starter
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Mountain Pass
Joined: Dec 2018
Posts: 127
Likes: 4
Doing that now, but I’m telling your guys I’m very confused on why it stopped running after I replaced that return line that was leaking very bad. It has to be something fuel related and I think there is just no way this is a coincidence that it would happen when I changed my fuel line. Could fuel maybe have leaked onto IPR/ICP wiring and caused the truck to shut off as it did. I had it running for about an hour yesterday but now it will not fire at all....
Lead Driver
Joined: Sep 2002
Posts: 9,524
Likes: 2,028
From: North Texas
Stuff breaks man, do not worry about it.
Have you pinned out the wiring from the IPR to the PCM?
Tried plugging truck in for a while?
You have fuel at the filter according to the gauge. Was it a tire gauge or screw on unit?
Where are you located?
Have you pinned out the wiring from the IPR to the PCM?
Tried plugging truck in for a while?
You have fuel at the filter according to the gauge. Was it a tire gauge or screw on unit?
Where are you located?
Thread Starter
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Mountain Pass
Joined: Dec 2018
Posts: 127
Likes: 4
im going to try plugging the truck in at this point I’m open to trying anything. It was a screw on fuel pressure gauge. I am located in Jacksonville. Florida