03 6.0 cranks, fires, but won't start. - Ford Powerstroke Diesel Forum
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Old 10-31-2011, 08:30 PM
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03 6.0 cranks, fires, but won't start.

so my truck wont start. it will fire up then shut down after a second or two. once the engine is hot it starts and runs fine. sometimes it wont even fire at all. injectors were all changed, oil and fuel filters changed. not too familiar with these engines, but very good with gas engines of all sizes. understand diesels, but not much experience with them. what should i be testing, and how?
no codes
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Old 10-31-2011, 08:39 PM
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i would test your FICM if your search it there are good write ups on how to check the proper voltage output. mine went last winter and had similar symptoms
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Old 10-31-2011, 08:48 PM
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The FICM (Fuel Injection Control Module) is located under the degas bottle on the driver side valve cover it has a small plate on it with 2 screws, if you remove that plate you should see 4 screw heads. IIRC, the closest screw to the firewall should read 48 volts, if it is less then the module will need to be repaired or replaced (I had mine repaired with a 2 yr warranty for $160) From Ford they are like $500.

If you check it yourself do not touch your meter lead to the case or you will let out the factory smoke, then you will be replacing the module regardless.
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Old 10-31-2011, 08:50 PM
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welcome to the site by the way you will learn a lot here read up in the 6.0 section.
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Old 10-31-2011, 09:01 PM
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thanks,will try that first thing in the morning.
just tried to start it again, and if i keep the pedal on the floor, it will stay running, but sounds as though its on one or two cylinders. as soon as i let off, it dies. didn't let it warm up that way to see if would would clear and run properly, but will in the morning.
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Old 10-31-2011, 09:21 PM
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after you do get it started does it eventually smooth out or run rough all the time?
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Old 10-31-2011, 09:26 PM
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I'd be willing to bet it's the FICM.
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Old 11-01-2011, 09:46 AM
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so we tested the ficm, sure we did it right, but here's the results. koeo- 24 dropping to 20, then a second or two after the glow plug light went out, right up to 48. this happens every time we tried it. cranking- dropped to 18 immediately, no start, occasional fire.
is this normal when they go bad?
batteries seem good, not load tested other than as much loaad as possible on the truck, but cranked fine. also tested while on a charger, and connections are clean.
anything else to test before replaceing the ficm?
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Old 11-01-2011, 12:56 PM
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Yes, that is a typical scenario when they go bad. Replace, or resolder the power supply and all will be right in the world.
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Old 11-02-2011, 07:46 PM
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When you were cranking it, and it finally fire then die immediately after "loping" a few times before falling on its face? When it did was it smokey almost as if it was flooded? My '04 stranded me today doing that. I had it towed to a mechanic but havent heard from them yet.
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