Warm start problem, 06 6.0 F-450 - Ford Powerstroke Diesel Forum
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Old 11-11-2008, 09:08 AM
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Warm start problem, 06 6.0 F-450

Hi everybody, first let me tell you I don´t really know much of this engines. I have (in my work) a 2006 6.0L F-450, and I have a problem with it.
It starts perfectly when cold, and runs very fine (I have just used it for a 6 hours trip, with 6 tons up). The problem is when I shut it off, and try to start it again. It cranks, but not fire up. If I let it cool down (about 30-40 mins), it again starts with no problem. Also if I put a little gasoline or starter in the intake air filter, it starts inmediately, even warm. Also if the truck is running, if I turn it off and try to start with ignition key, it doesn´t start, but if I put 4th or 5th gear, and take out the clutch, it starts inmediately and very smooth.
We have taken this truck to a service shop (here in Monterrey the dealers don´t know much about this trucks, the service shop I went was recommended by a dealer, because they are not ready to service this engine), and they have done a lot of things, but the problem is still there. Some of the things were done are: Changing 6 injectors, repairing the heads (with all the associated cost), and adjusting the relays box.
Let me tell you that the service engine ligth is not turned on, and that this problem is only when the engine is warm

Do any of you have any suggestions? please use common words, I´m a real rookie in this
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Old 11-11-2008, 10:14 AM
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Being an '06 model year, I will bet my life that the cause of your no-start issue is due to low ICP pressure? What is the mileage? If less than 100,000 miles, the repair IS covered under warranty. Does your local dealer have any Ford Diesel Certified Techs? Either way, the servicing tech needs to monitor the following data: ICP (both pressure and volts), IPR duty cycle, RPM, FICM SYNC, SYNC, VPWR. By what you describe, I am ready and willing to bet you have a blown STC fitting and/or deteriorated dummy rail lower o-rings, being an '06 model year. Go back to your servicing dealer and ask them to check OASIS for TSB article number 08-18-6 for more information.
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Old 11-11-2008, 12:32 PM
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sounds like you have a STC fitting going out on the high pressure oil pump or one of the dummie plugs in the high pressure oil manifolds (under the valve covers) are cut and leaking oil when they are expanding from the heat!!
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