Vacum question
Thread Starter
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Posting Guru
Joined: Jul 2008
Posts: 1,302
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From: Morehead, Ky.
Vacum question
After having to have a valve cover gasket and wiring harness replaced in Cody, Wy. on my 2003 7.3. My A/C goes to defrost for a few seconds, before going to A/C. Could there be something around the valve cover, that was left loose, or just a coincedence and the hub seals are going?
Thanks Jim
Thanks Jim
Hotshot
Joined: Feb 2007
Posts: 10,499
Likes: 10
From: Sterling Heights,Mi
Your vacuum comes from a pump on the passenger side firewall. It would be real easy for you to checkif it was the hub seals by simply disconnecting the hose to the hubs, put you finger over the line, and have some one select A/C.
By the way, you don't get vacuum to the hubs unless you select 4x4.
Good luck!
By the way, you don't get vacuum to the hubs unless you select 4x4.
Good luck!
Thread Starter
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Posting Guru
Joined: Jul 2008
Posts: 1,302
Likes: 1
From: Morehead, Ky.
It is when you turn on the A/C, or at start up. 4x4 not in use.
Turn on the A/C. Mode switch in A/C or Max A/C. Defroster comes on for a short time and then slowly the door will close and the air then comes out the A/C vents.
Turn on the A/C. Mode switch in A/C or Max A/C. Defroster comes on for a short time and then slowly the door will close and the air then comes out the A/C vents.
