ICP open circuit, no start after mods - Ford Powerstroke Diesel Forum
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Old 06-01-2014, 04:32 PM
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ICP open circuit, no start after mods

2005 6.0


I'm under the gun on this one - my Grandkids are expecting me to hook up the trailer on Tuesday and take them camping.

I just finished coolant flush, egr delete, oil cooler, VGT clean with new oil feed and drain tube, IPR screen and blue spring. Other than high deltas, was running good before but figured I would do as much as I could while I was in there. The information on this and other sites was invaluable!

Buttoned all up and of course it was no start. Thought at first it was all the air in the system but after numerous attempts and tests I think I have tracked it down to an open circuit on the ICP PCM wire. I do have 5 volts on the VREF wire to the connector. The ICP - C wire on the connector shows open circuit when tested with the pin on the disconnected PCM. It also was throwing a P2285 code.

My scangauge shows no ICP during crank

KOEO
IPR 14.4
ICP 0
FMP 48.5
SYN 0

Cranking
IPR 58.8
ICP 0
FMP 49.0
SYN 1

Still no start with ICP unplugged (ICP shows 1465 when unplugged)

First question - Would an open circuit alone prevent an unplugged ICP start?

I can't find the open circuit along the harness and was thinking of running a new wire from the PCM pin 29 to the C wire on the ICP connector.

Any thoughts on that solution?


Thanks in advance for any suggestions.

Williston324
2005 F250, 6.0, Crew/4x4
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Old 01-26-2015, 10:34 AM
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watching this.
Sounds like mine too. My IPR shows 14.71 and 71.?? cranking but my ICP shows 0 volts after installing a new ICP.
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Old 01-26-2015, 11:43 AM
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I should have posted a follow up months ago.

I discovered the hard way that YES you can install the STC fitting upside down!!

It now runs like a charm and my deltas are back where they should be, 3-4 spread and towing a heavy fifth wheel in hot weather they are only 7-9 deg apart.
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Old 01-26-2015, 11:53 AM
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Guess I will have to send mine to the dealer. No other codes or anything. Just a no start problem and no voltage showing on the ICP. What is weird is when I crank it over the ICP psi goes up to 1580.6 really quick so I am assuming I have good HPOP with no leaks.
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Old 02-06-2015, 01:19 AM
Dr. of Linemantology
 

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u might want ot consult one of the techs but i think 1580 psi is way low and probaly why u have a no start issue. what year is your truck. if its and 05 they had problems that year with those stc fitting going bad. the guy whose thread this is made me laugh cause he said he installed the hpo rails or the fittings upside down. im assuming he just had them swap around wrong side. its also easy to forget to remove them before u pull the head. i know i still do small stupid stuff that adds time and headaches to even what seems like an easy job. good luck with thyat no start issue. i think u should be around 2500-2800 psi at crank. i may be somewhere else with numbers but that my first thoughts on it without looking it up. ill go look thatr up for u. i dont want to give bade info. ill get back with u
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