4x4 auto hubs vacuum - Ford Powerstroke Diesel Forum

 
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post #1 of 2 Old 08-25-2010, 05:54 PM Thread Starter
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4x4 auto hubs vacuum

2002 f350 dually psd 6spd. 75000 miles. When I flip the switch to engage 4x4 in low range and my a/c is on the door moves to defrost for about 20 seconds then it comes back to vent. It acts like I lose vacuum for a while. Any help?
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post #2 of 2 Old 08-26-2010, 07:21 AM
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I PM'd ya. you more then likely have a leaky system or a bad solenoid.

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