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Odd Hissing

Old 11-20-2012, 04:33 PM
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Default Odd Hissing

I've searched on the forum and haven't had much luck so here this goes...

I have a hissing, sounds like it coming from under/behind the dash. It stops when I hit a higher speed and when i put the brake pedal down maybe half way. what is this???

Thanks!
Old 11-20-2012, 04:38 PM
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Leaking brake booster. It's sucking air in thru a bad spot.
Old 11-20-2012, 04:39 PM
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^this
Old 11-20-2012, 05:51 PM
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So its the booster, not a hose??
Old 11-20-2012, 06:21 PM
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There shouldn't be any hoses under the dash in that area. If it were a vacuum problem with the heater, it wouldn't work right. I've ran across leaking boosters a few times and you can hear the problem.
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