2004 F250 6.0 Won't start - Ford Powerstroke Diesel Forum
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Old 05-16-2011, 03:58 PM
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2004 F250 6.0 Won't start

Drove the truck home the other night and parked it, next morning started like normal but shut off after 30 seconds and would not restart. I have oil pressure according to gauge when cranking. I replaced both batteries then replaced the ICP. If I leave the ICP unplugged the truck will start and run rough for a few seconds then shut off. If I plug the ICP in it just cranks but won't start. I used a code scanner but only get a code for the ICP when it's unplugged. I took the FICM out and checked it and everything looked great. Not sure what to do next but take it to the dealership which I am avoiding at all cost. Any help would be greatly appreciated.
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Old 05-17-2011, 01:48 PM
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was it dogging when you drove it last could be fuel prob (ipr) but good be a number of things
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Old 05-17-2011, 02:29 PM
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icp

No it was running perfect when I drove it last. If I keep the ICP unplugged now it will start and run rough for 30 seconds or so. If I have it plugged in it will not start at all and under the dash there is a clicking sound. Gauges seem abnormal if plugged in also.
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Old 05-17-2011, 04:00 PM
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check your fuses and relays
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Old 05-17-2011, 04:28 PM
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I checked all the fuses under the dash and the 1 under the hood. The relays under the dash are interchangable so I switched them around and still nothing. I know you should not use starting fluid but I did and truck will start, so when the icp is plugged in it is causing no fuel to come through I think. Under the hood I found two small boxes by firewall with relays and 1 fuse. Do you know what these control?
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Old 05-17-2011, 04:35 PM
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not off the top of my head. hopefully you sprayed threw the air box. sounds like its not getting fuel. might be hpop or ipr. change you fuel filter recently
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Old 05-17-2011, 04:51 PM
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Yeah I sprayed through the airbox. I may try to change the ipr and see what that does. I heard to test it by putting 12 volts on it and see if it clicks. If it is bad would that cause my truck to not start?
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Old 05-17-2011, 06:09 PM
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its the pressure regulater for the injectors so no truck wont start
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Old 05-17-2011, 06:11 PM
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But would unplugging the ICP allow it to start for a short period?
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Old 05-17-2011, 06:39 PM
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It sounds like you have lost HPOP pressure, could be the standpipe O rings blown out or the HPOP outlet fitting; both are common on the 2005 as I had 5-6 in my fleet. The optimal test is with a scan tool, monitor actual ICP vs DESIRED ICP and that is usually a good indication of the condition of the high pressure oil system. Next is the air pressure test, where air is slowly introduced to the injector oil circuit via the ICP sensor opening in the RH head.

Parts are affordable, labor is not so easy though. I see a lot of these failures in the '05 trucks.
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