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Old 02-16-2014, 07:06 PM
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New engine no start, TRIED EVERYTHING

Hey guy, here's my problem, I have a 2008 f250, HS mini maxx, 5" flo pro full deletes, egr delete, CCV mod.

I put a new short block in, engine cranks but won't start, no codes, checked everything, also I have zero High pressure fuel, scanner reads flat 0 truck cranks great but will not even try to fire.

I have 5 psi for my low pressure fuel which is within spec. I've bled the fuel system everyway possible, low side, high side, let the fuel bowl fill up and I still have no fuel pressure from the HPFP. I've been told from a veteran ford diesel tech that even with a completely destroyed pump I should see some sort of pressure from the HPFP. He's done over 60 HPFP on these trucks and has never seen 0 psi

Could it be a PATS issue? I'm beyond stumped. Any help would be great

I've heard of people needing new keys from the truck being dead so long but I dunno?
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Old 02-22-2014, 04:18 PM
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If it cranks, it isn't the PATS system.

What are the PCV and VCV being commanded to during the cranking event?
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Old 02-22-2014, 04:53 PM
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Did you at all touch the pump? The gear is an interference fit. If it's not tight it's not going to spin the pump.
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Old 02-23-2014, 03:57 AM
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Quote:
Originally Posted by Big Angry Hillbilly View Post
If it cranks, it isn't the PATS system.

What are the PCV and VCV being commanded to during the cranking event?
You are 100% correct I know where your heading. I had 5 factory motors do this. Picked cab back up and replaced hpfp for bad valves. 3 of them ohmed correctly 2of them had valves stuck open.
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Old 02-23-2014, 04:00 AM
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Originally Posted by sinner6.0L View Post
Did you at all touch the pump? The gear is an interference fit. If it's not tight it's not going to spin the pump.
One of my friends did his whole job and called me for no start after he was done. I asked him to look at old pump and see if gear was on it. Guess what it was!!!!!!!! Oooops lesson learned.
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