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Re: Brake Booster Noises
Posted by Todd 83-900T (more from Todd 83-900T) on Mon, 25 Nov 2002 20:24:19
In Reply to: Brake Booster Noises, JD From LA, Mon, 25 Nov 2002 19:26:59
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"The brake booster works properly and passes all brake booster tests. The pedal sinks slightly when starting like it should. Stepping on the brake brings no change in idle quality. The booster also provides proper power assist."
I had the exact same symptoms. I heard a hissing noise from under the hood whenever I shut the engine off. While monitoring the O2 sensor voltage I sprayed a little starting fluid where the booster connects to the master cylinder and pow the O2 sensor went nuts, indicating a vacuum leak.
If the booster leaks replace it or do what Anders suggested. After replacing it the vacuum leak disappeared, my brakes work much better and the car has never run better. Damn vacuum leaks....
Todd
posted by 128.110.4...
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