6.0 extended crank problem - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 05-06-2012, 08:10 PM Thread Starter
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6.0 extended crank problem

Hey guys, Im having a very intermittent extended cranking problems Every now and then I get in the truck turn the key and the engine will crank a few extra seconds then normal but it only happens every now and then and usually when the trucks sat over night or it cools down a bit then I go to re start it, when it finally fires up there's no smoke doesn't run rough at all runs normal once she gets going, I'm thinking maybe a high pressure oil leak somewhere?!?! But I'm not sure about it.

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05 350 6.0

updated fuel pressure spring
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Glow Shift gagues tranny temp coolant temp egt
Volant cold air intake
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post #2 of 11 Old 05-06-2012, 08:25 PM
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Sounds like a leak in the HPOP system. I see you already have the STC fitting so it probably isn't that. Maybe a leaking dummy plug or standpipe. You can read a lot about upgrading this stuff in multiple threads on here. Do some searching and you'll be surprised what you can find out.

Mike
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post #3 of 11 Old 05-06-2012, 08:27 PM Thread Starter
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Yea I was suspecting those just wanted to see what everybody else thought maybe something simple I overlooked

05 350 6.0

updated fuel pressure spring
Stc fitting
egr delete
Cat elc coolant
Sinister coolant filter
6.4 banjo bolts
Updated turbo lines
Glow Shift gagues tranny temp coolant temp egt
Volant cold air intake
2.5 leveling kit
Stand pipes dummy plugs
High idle mod
Fog light mod
Zoodad mod
MBRP 4 inch straight pipe
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post #4 of 11 Old 05-06-2012, 08:29 PM
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Yea, heard cranking is almost always a HPOP leak. If you were getting smoke after startup it could be an injector problem but that isn't very likely especially if the truck is running good while its idling. Good luck

Mike
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post #5 of 11 Old 05-06-2012, 08:32 PM Thread Starter
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Yea ill order them up soon and get them switched out hopefully that will fix the problem

Thanks

05 350 6.0

updated fuel pressure spring
Stc fitting
egr delete
Cat elc coolant
Sinister coolant filter
6.4 banjo bolts
Updated turbo lines
Glow Shift gagues tranny temp coolant temp egt
Volant cold air intake
2.5 leveling kit
Stand pipes dummy plugs
High idle mod
Fog light mod
Zoodad mod
MBRP 4 inch straight pipe
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post #6 of 11 Old 05-06-2012, 08:59 PM
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Well mine turned out the be LPOP for something simauar and I had the same symptoms until I didn't have oil pressure at idle anymore. But I would start with the HPOP area first

I'm addicted to diesel and I step on it constantly!

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post #7 of 11 Old 05-07-2012, 06:03 AM
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I've got the same thing going on that I've been trying to figure out for a while. Only does it when cold, so I thought that ruled out the stand pipes/dummy plugs??

06 F350 Lariat
Edge Insight CS
Blue Spring Update, EGR Delete, STC update, Stand Pipes and Dummy Plugs, Turbo feed and drain tube update, Sinister coolant filter, New stock oil cooler, Zerex ELC, RiffRaff Boots, Isspro Fuel PSI, DC Alternator, ARP Studs, Heads from Jared, OEM Head Gaskets, Yukon Dura-Grip Posi
Warren 155cc/stock injectors
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post #8 of 11 Old 05-07-2012, 08:19 AM
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The reason that I would rule out LPOP for you though is at idle I had no oil pressure and at and after 1k rpm I had normal oil pressure

I'm addicted to diesel and I step on it constantly!

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post #9 of 11 Old 05-07-2012, 11:28 AM
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Well I wanted to update you guys and tell you that it was the HPOP and it's ready to go. The one guy made a mistake telling me on the phone. But I'm about to go pick my baby up yay!

I'm addicted to diesel and I step on it constantly!

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post #10 of 11 Old 05-07-2012, 05:11 PM
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Mine is doing the same thing. When it's really cold outside, its fine. When its warm outside, it's better. When the ambient temp is about 45 to 30, it cranks much longer. My mechanic checked the glowplugs and they were fine.
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