2005 F250 Superduty Vacuum Pump Problems - Ford Powerstroke Diesel Forum
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Old 04-21-2010, 06:31 PM
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2005 F250 Superduty Vacuum Pump Problems

What all does the 2005 F250 Superduty Vacuum Pump control?

Had problem with my 2005 diesel not starting but strongly turning over Opened the hood and the vacuum pump was making lots of noise.

When the white plastic vacuum port was sealed off, the truck started.

Will replace the vacuum pump tomorrow when I can get one.

Could there be other problems?

Thanks,

T
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Old 04-21-2010, 07:02 PM
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Vacuum pump controls your heat/ a/c blend, and your auto hub engagement.
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Old 04-21-2010, 08:16 PM
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Quote:
Originally Posted by Rideout's Mechanical View Post
Vacuum pump controls your heat/ a/c blend, and your auto hub engagement.
Thanks.

Appears that I may have another problem with the diesel engine not wanting to start after runnig it for 45 minutes then stoping it.
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Old 04-21-2010, 11:01 PM
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Does it start OK cold, but not warm? Has it ever just "shut down" on you? I suspect the STC fitting. Seems to be a common problem.
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Old 04-22-2010, 08:05 PM
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2005 F250 now has 114,060 miles. Head gaskets and EGR cooler were replaced at 78,000 miles by Ford. I did buy the 200,000 Diesel EngineCare Warranty when it had 99,982 miles on the vehicle.

Ran diagnostics today at my cousin's shop. The diesel engine would not start after being turned off. When it cooled down, the diesel started. The diagnostic showed low oil pressure when the engine just spun over. Once the diesel engine started, it came to pressure.

Cold mornings/days it runs rough until it gets warm.

The Ford shop noted that it probably has one or more injectors not operating until they warm up.

The engine not re-starting when warm is a oil leak and probably the STC fittings as you noted and another Ford shop told me this morning.

It is going int the Ford shop in the morning and it two or three days they will look at it.....

Thanks guys for your help.

T
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Old 04-22-2010, 09:42 PM
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Good luck. Mine has to go to Ford Monday, I think my steering box blew up. I have no power steering, no leaks, lots of oil, quiet pump and good hydra-boost brakes. Glad I bought the ESP.
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