94 OBS No Start - Ford Powerstroke Diesel Forum
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Old 05-03-2013, 10:57 AM
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94 OBS No Start

Hi guys, I need a little help to point me in the right direction. I'am new to the diesel world, but not to working on engines. I just picked up a 94 F-350 with a powerstroke and it suffers from the common " no start" condition. Prior owner said it died, put another fuel filter in it and it ran another week and died again. This is what I do know i have:

- has fuel in filter bowl
- builds about 35psi at shrader valve coming off fuel filter assembly when cranking
- Did not have oil in HPOP, but replaced LPOP and reservoir is now full
- Will run and die with a shot of WD-40
- ICP does have oily connector, but unsure if it's bad enough to keep it from starting.
- Disconnected ICP and still no start
- Has new CPS and tach does bounce

It seems like a fuel issue to me, but i'am unsure how to narrow down if it's the HPOP, IPR, ICP, or possibly the IDM?

Last edited by repo94; 05-03-2013 at 12:05 PM.
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Old 05-03-2013, 01:03 PM
Can you hear the derail??

 

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Anyone close to you to let you swap idm's shortly? Good thing to keep a spare, there was a member with a mud truck who could start it the same way and his ended up being an idm
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Old 05-03-2013, 03:05 PM
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I really don't know anyone off the top of my head that has one of these trucks to swap with. A friend of mine has a salvage yard, but it will be the middle of next week before i can get out there to look for back up parts. I was planning to look for a extra one to keep on hand. Any idea what pressure i should be seeing if i hook into one of the lines from the HPOP? I think i read somewhere 400-500 psi to start, does that sound about right?
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Old 05-04-2013, 02:27 PM
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So today i went out and tried testing the HPOP. Plugged line going to passenger side head, and pulled drivers side line and installed gauge. Cranked engine for about 30 seconds multiple times and nearly no pressure. Does this mean the HPOP is bad? or should I be looking at the possibility the IPR is stuck or bad?
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