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Sean Marconette · 08-20-2014, 01:28 PM

The search I found stated the vacuum pump should produce 17-21" of vacuum. If the damper is in defrost is also a sign of not enough vacuum. A cheap hand operated vacuum pump will diagnose a bad hose or damper diaphragm, and could be used to show what the vacuum pump is pulling. What is the brake pedal like?

Sean

08-20-2014, 01:28 PM	#5
Sean Marconette Senior Member Join Date: Mar 2006 Posts: 959 Likes: 620 Liked 165 Times in 60 Posts	Re: 2000 Ford F250 Diesel air cond problems The search I found stated the vacuum pump should produce 17-21" of vacuum. If the damper is in defrost is also a sign of not enough vacuum. A cheap hand operated vacuum pump will diagnose a bad hose or damper diaphragm, and could be used to show what the vacuum pump is pulling. What is the brake pedal like? Sean __________________ Sean Marconette 84 Mustang 5060 SS/N Last edited by Sean Marconette; 08-20-2014 at 01:32 PM.