intermittent stall/ no start - Ford Powerstroke Diesel Forum
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Old 12-09-2012, 03:14 PM
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intermittent stall/ no start

Truck stalls while driving then won't start. Changed icp, IPR, cmp, injector harness last week and 8 injectors, updated stand pipes last month. I have AE if further testing is needed. Any help would be appreciated. Not sure what direction to go next.
Ficm 48 v koeo/more
IPR 14.84% koeo 24%koer
ICP 580 psi warm idle 650 psi cold idle
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Old 12-09-2012, 09:32 PM
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i take it you aren't throwing any codes?
next time it won't restart, cycle the key on and listen for the fuel pump down at the dr. side frame rail.
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Old 12-10-2012, 03:14 AM
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Only codes im getting is from low voltage from extened cranking. Gonna check fuel pressue today if i get a chance. I'll listen for the pump. i'm thinking its maybe a wiring issue.
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Old 12-10-2012, 01:34 PM
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Just checked fuel pressure, 53-54 psi at idle from secondary filter test port
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Old 12-10-2012, 07:04 PM
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you need to see pressure when the problem is occurring. or at least listen for pump operation. also, need to view icp and ficm voltage at the time of fault.
pretty hard to find the problem when it isn't occurring
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Old 12-11-2012, 04:28 AM
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Its real hard to find when it doesn't occur. Gonna drive today and see if it quits. Will post finding after
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Old 12-11-2012, 08:37 AM
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Drove truck git it to stall/no start. While cranking this is what i found
icp 340 psi
ipr 85%
ficm 48 v
batery 12.25 v
fuel pump 99.85%
fuel pressure 52%
I know it won't start without 500 psi. But why did it stall in the first place? I did stumble accross this, the truck died in the exact spot it did previously. Driving uphill around a left curve. Tried another hill with a leftt curve, same thing.
What would cause this?
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Old 12-11-2012, 11:35 AM
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It stalled because anytime normal operateing paremeters drop below threshold the engine will shut down. What you need to do is drive it while A&E is hooked up and data logging unitl the event happens then do a freeze frame. Save the log or print it out and see what dropped out.

Do this with a helper operateing the A&E so ya don't run over anything.
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Old 12-11-2012, 04:59 PM
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Only does it when warm. The question might be 2 fold, high side or low side oil. The IPR is commanding more pressure, but the pump isn't doing it or you have a HP oil leak. The other side is you have no oil getting to the HPOP.

Did all the work create the problem, or was all your work to try and fix the problem? What was wrong with the injectors?

I'll assume you have proper oil levels and no obstructions/problems in the filter assembly.
Are you sure of your previous work?
You changed the IPR. Why and what did it look like?
Have you tried hooking up shop air?
Have you check the low side pressure or filter fill rate?

Lots of questions, If it always starts cold, it is pointing to the HPOP. It would be nice if it was something simple like a computer malfunction. Your monitored run should steer you to a faster answer.
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Old 12-11-2012, 08:57 PM
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i noticed that the mods don't include updated rail plugs. have they been done?
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