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4x4 Vacuum Issues

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Old Dec 30, 2013 | 09:43 PM
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kmc0929's Avatar
kmc0929
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4x4 Vacuum Issues

2006 F250 with the dash controlled 4x4 ****.

I typically keep the front hubs locked on this truck. I have recently noticed that when shifting into 4x4 that the a/c or heat will switch from blowing out of the vents to blowing out of the defrosters. Any clues how to fix this?
 
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Old Dec 31, 2013 | 08:07 AM
  #2  
Rongold's Avatar
Rongold
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From: Putnam Valley, New York
VACUUM LEAK

Originally Posted by kmc0929
2006 F250 with the dash controlled 4x4 ****.

I typically keep the front hubs locked on this truck. I have recently noticed that when shifting into 4x4 that the a/c or heat will switch from blowing out of the vents to blowing out of the defrosters. Any clues how to fix this?
You have a vacuum leak somewhere between the vacuum solenoid mounted on the passenger side fender and the locking hubs. It's more than likely one of the thin plastic hoses or one of the rubber hoses that connect to the steering knuckles. It could also be the knuckle seal or the o-ring around 1 of the locking hubs, but more than likely a leaking hose. Let us know what you find.


RON
 
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