Running Terrible
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Running Terrible
I started my 01 350 7.3 up the other morning and right off the bat it ran terrible, (first and only time ever). 200k + miles and valve covers have never been off. Engine light was on. Just let it idle for awhile with no improvement (oil pressure was good) it did make attempts to clear up (not really much smoke) would not really rev up and was idling up and down and almost stalling. Left it for a couple hours went back at it perfect right off the start, ( no engine light) drove it about 3 miles to mechanics place perfect. He scanned it no codes, and has ran it several times perfect. To me it seemed like several cylinders were not firing and I suspect the UVCH. If so how can we test them to confirm that diagnosis without pulling it apart? Also suspected water in fuel but no light (if there is one) mechanic changed fuel filter and all seemed to be fine there. As I am in Canada I guess the only place to get UVCH from is Ford. Plan on making an extended trip to Az. Ca. and Mexico in 2 weeks so need to resolve this. Does the hutch come into play if we replace the UVCH'S Thoughts please!!
Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
Sounds more like the glow plugs either needed more time before cranking, or you could have electrical issues with GPs or injectors. You can click the UVCH link in my signature for troubleshooting tips.
Senior User
Joined: Mar 2008
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What Tugly said. Make sure if it's cool out, you wait longer to start than just when the wait-to-start light goes out. Try giving another 10-20 seconds. And definitely click his link and check out the testing of the UVCH's. Very common problem, and you're exhibiting exactly the symptoms of a loose UVCH connection that's just barely hanging on most of the time.
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Well after all that truck has run perfect since then, truck was serviced and UVCH's replaced. No obvious problems. Have just travelled for three days to get to Ca. and put on one thousand miles. Arrived last evening shut down and this am started up and running terrible again just like last time but couldn't get to clear up. Had trucked towed to ford dealer this pm. and they will scan. Scanned it with my edge evolution and got 2 codes, but forgot the paper I wrote them on in the truck at the ford dealer!! It's been a lousy day am in Palm Valley Ca. but couldn't find any diesel shops in yellow pages. Any body have any ideas? CPS maybe???
More Turbo
Joined: Feb 2004
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From: Findlay, Il
Process of elimination: unplug one side of UVCH, run motor (any better, any worse). Then do the other side. It sounds like a plug may have came loose and/or some bad pins within! Again, check Tugly's trouble shooting tips.
How much fuel is in the tank?
How much fuel is in the tank?
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Laughing Gas
Joined: Nov 2013
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From: SoCal
P1316 is a code telling you the IDM has codes stored. Did you run it with the UVCH unplugged? If so, that could be the cause. If not, that might be your problem.
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Laughing Gas
Joined: Nov 2013
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From: SoCal
Injector driver module. Think of it as a distributor, but instead of sending spark to spark plugs, it sends voltage to the injectors which opens the poppet valve to let high pressure oil in to push fuel into the cylinder.
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It appears that one of my recently installed made in China UVVH's (1 week ago)might have been defective am I the first or is this not unusual?? 2 questions. Can you disconnect your glow plugs some way and still run truck in a warm climate and the other is. If you were in a desperate situation and your #8 injector was giving you grief could you switch it with another on the same bank to make the problem go away temporarily?
Laughing Gas
Joined: Nov 2013
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From: SoCal
What kind of grief is #8 giving you? 8 is an AE injector used to reduce fuel knock. It'll work in other holes, but unless the problem is o-ring related, it'll follow the injector. If the problem is fuel knock, it'll get worse putting an AD in cyl 8 without a FRX installed. You can start and run without glow plugs working but it'll take some cranking and may smoke until warm. It'll also cause a CEL.
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