Idle, stutter, dead
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Senior User
Joined: Feb 2006
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From: Salem Oregon
Idle, stutter, dead
My truck died, was about to leave a parking lot, started engine, it idled a bit, stuttered, died. Fortuneately I had just finished buying the other day a new fuel filter and my stop prior to this store, the diesel to prime the new filter. Changed it out hoping the old was clogged. the engine turns over but acts like its out of fuel (two near full tanks). Had someone depress the schrader valve on the fuel filter assembly while I turned the engine over, nothing from the valve but an initial hiss of air.
Since it did not spray fuel or anything, I am thinking its the mechanical fuel pump.
I'm going to change it after work this evening, hope the new pump fixes it as I have a big trip this weekend and need it.
Your thoughts?
(Have checked fuses and such thinking it could be a burned fuel selector switch fuse, nope)
'85 F350 Diesel 6.9 3-speed.
Since it did not spray fuel or anything, I am thinking its the mechanical fuel pump.
I'm going to change it after work this evening, hope the new pump fixes it as I have a big trip this weekend and need it.
Your thoughts?
(Have checked fuses and such thinking it could be a burned fuel selector switch fuse, nope)
'85 F350 Diesel 6.9 3-speed.
Cargo Master
Joined: Oct 2012
Posts: 3,072
Likes: 48
From: California
Pull the hose off the diesel filter head and crank it over. If you are getting fuel, then the pump works. if not, you could have a clogged line or a bad pump.
doubt its the selector valve, because it should default to one of your tanks, thus fuel supply shouldn't be a problem.
doubt its the selector valve, because it should default to one of your tanks, thus fuel supply shouldn't be a problem.
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Senior User
Joined: Feb 2006
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From: Salem Oregon
New problem, clogged fuel line in from the front tank, got the front tank dropped, new EDPM fuel line for running VWO ready, got a couple hours tomorrow before work to replace the lines, hope to get it done 
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Postmaster
Joined: Feb 2011
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call me paranoid, but if i'm gonna install a new rubber hose somewhere thats under suction, i'm also gonna put a coil spring inside it so it can't suck itself closed and give me future trouble. and as always, minimize the length of rubber hose in the system, using hard line as much as possible.
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Senior User
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From: Salem Oregon
call me paranoid, but if i'm gonna install a new rubber hose somewhere thats under suction, i'm also gonna put a coil spring inside it so it can't suck itself closed and give me future trouble. and as always, minimize the length of rubber hose in the system, using hard line as much as possible.
Good point, may have to give it a try. Eventually, when my local machine shop slows down a bit, I'm going to have some custom steel hose lines made for as must as I can. Will be using the hose still for the needed flex areas but eventually I will build a bullet proof fuel system. I have already planned to replace this new stuff down the road, won't be too costly as the 3/8" hose I got for $.64 a foot and the 1/4" for $.48 a foot.
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Cargo Master
Joined: Oct 2012
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From: California
Or just buy or borrow a tube bender and flaring kit, and make your own steel or aluminum lines. It's not that hard. I used to install rubber hoses everywhere, but after years of tracking down pinhole leaks, flattened hoses, and/or kinked hoses, now I use aluminum wherever and whenever I can. Plus it looks cool too and uses less space. there is always the problem of metal fatigue, but if extreme vibration is a concern, that is where you pull out the small sections of rubber/EDPM and kink resistance slip-over coils, wherever necessary.
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Senior User
Joined: Feb 2006
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From: Salem Oregon
Or just buy or borrow a tube bender and flaring kit, and make your own steel or aluminum lines. It's not that hard. I used to install rubber hoses everywhere, but after years of tracking down pinhole leaks, flattened hoses, and/or kinked hoses, now I use aluminum wherever and whenever I can. Plus it looks cool too and uses less space. there is always the problem of metal fatigue, but if extreme vibration is a concern, that is where you pull out the small sections of rubber/EDPM and kink resistance slip-over coils, wherever necessary.
My local machine shop has been really good to me, I like to give them my business when I can. Its a newer small business slowly growing by word of mouth. By involving them in working on the WVO, I hope it will be a learning experience that could earn them more business.
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