1990 Ford Ranger

jstar1990 · #1 03-21-2011, 09:01 PM

I have a 1990 Ford Ranger, and when its running and the brake is pressed, it hisses and the engine revvs. Any ideas why? I've been told its the cadiladic converter or theres a hole in the brake booster. They work fine, other than the hissing and revving.

toddler62 · #2 03-22-2011, 11:05 PM

Check your vacuum lines. Hissing noise could be a vacuum leak. Have someone press the brake with hood open and you out listening. Might be the vacuum booster leaking

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