Updated STC and still long crank! - Ford Powerstroke Diesel Forum
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Old 04-22-2013, 07:46 AM
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Updated STC and still long crank!

Looking for some insight...

Last week I did a lot of preventative work hoping it would cure my occasional long crank issue. I updated my STC, Standpipes and dummy plugs, and replaced the o-rings and seals, and polished the spool valves on all 8 injectors. In the last 4K miles I have also replaced my oil cooler, egr cooler with the bulletproof one, and the IPR (because I let trash go through it when changind my oil cooler).

Some of my starts are 1-1.5 seconds. Most are 2-3 seconds, and sometimes (usually when warm) I get over 5 seconds.

My ICP climbs to well over 500 as soon as I start cranking, my fuel pressure is in the 60s, I have new batteries that are usually around 12.2-12.5 when the glow plugs are on and recover to 13.2 after they turn off.

FICM never drops below 46.

I'm running 5w-40 full synthetic Schaeffer oil with about 3000 miles on it and an oil analysis just done that says I have plenty of life left in it.

New Racor fuel and oil filters at last oil change 3K miles ago.

Running great and always starts eventually, but it's got me worried...

Any ideas?

Last edited by fuzzman; 04-22-2013 at 07:47 AM. Reason: missed detail
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Old 04-22-2013, 07:50 AM
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How many miles on it since all of the HPO work? Sometimes takes quite a while to get all the air out of the system. Up to 5-7 seconds is within Ford specs on crank time.
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Old 04-22-2013, 08:00 AM
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Maybe 200 miles. I had a little shaking and stuttering every once in a while still, so I think you are right about a little air still in the system.

I think you told me a few months back that 5-7 seconds was considered normal, but I'll tell you it sure doesn't feel normal while I'm in there wearing out my starter to get the thing to fire! Momma looks at me a little funny too (you know the "are you sure we shouldn't have paid someone who really knows what they are doing to do the work on the truck" look). Also, plenty of times I get a 1 second start.

Thanks for the
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Old 04-22-2013, 09:09 AM
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I'd say get some more miles on it and see if it gets any better.
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Old 04-22-2013, 09:38 AM
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Will do that, not much choice anyway. Gotta drive and no time for wrenching for a while! So maybe residual air in the system causing my problems?
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Old 04-22-2013, 12:39 PM
Illiana Chapter Director

 

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That's gonna be my guess. If you're building 500+ psi, that tells me the HPO system is good.
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