What causes the sound of air hissing in dashboard around stirring column?

1984 FORD CROWN VICTORIA
65,448 MILES
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TERESA IRVING
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I started the car and heard a loud pop under the hood then the sound of air which stopped after the car was in drive. Now however, the sound is all the time no matter what gear it is in. Could this be a vaccum hose?
Feb 13, 2012 at 10:08 PM
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CADIEMAN
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youll need to take the under dash panels down to trace this noise.its a vacuum hose.
Feb 13, 2012 at 10:20 PM
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CJ MEDEVAC
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OPEN YOUR HOOD, DISCONNECT THE BRAKE BOOSTER VACUUM LINE AND CAP/ PLUG THE LINE---CRANK HIM UP

DID THE HISSING STOP INSIDE?

IF SO, YOU NEED A NEW BRAKE BOOSTER

IF NOT---DIG INTO THE DASH!

THE MEDIC
Feb 14, 2012 at 3:42 AM
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