Question about 1995 Ford Mustang

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Is there a way to tell what vaccum lines are leaking with out changing them all out one by one on a 95 mustang

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  • Wizzap Jun 18, 2009

    Im trying to find a Vaccum leak in the AC lines that control defrost and such will the Carb cleaner trick work

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A really good trick for locating vacuum leaks is to use a can of aerosol carburetor cleaner. The engine will run on this stuff, just like gasoline. Install the little red wand onto the nozzle and spray the carb clean onto each vacuum hose, in turn. If the hose is cracked, the carb cleaner will be sucked into the engine and burn. This will cause the engine to rev up slightly, while you are spraying onto a leaking component.
To check vacuum diaphrams, you need to purchase a hand vacuum pump, like the one shown in the web link below.

http://www.amazon.com/Actron-CP7830-Hand-Vacuum-Pump/dp/B0009XQUK2

I prefer these to those crappy, all plastic units sold by MityVac. I've seen them even cheaper than the price in this link.
Charlie
PS, If the vacuum hoses are dried out and show signs of cracking, it is best to change them all. Only change out one at a time, to avoid confusion.

Posted on Jun 18, 2009

  • Charlie Jun 18, 2009

    If the vacuum lines are under the dash, it works best to check them using the hand vacuum pump mentioned before. On the dash, one of the controls (mode control) is a vacuum switch. There will be a vacuum connector attached to the rear of the switch. Remove the connector. Start the engine and one of the hoses should have vacuum. That is the source hose. Check all the other hoses using the vacuum pump to see if they will hold vacuum. If they leak, you must check the hose and whatever vacuum servo it goes to, to determine the source of the problem.

    Charlie

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