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Re: Brake Booster
Posted by Bill S. [Email] (more from Bill S.) on Mon, 12 Sep 2005 21:16:27
In Reply to: Re: Brake Booster, bj, Mon, 12 Sep 2005 15:49:22
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The brake booster is evacuated by engine vacuum. I believe that when you step on the brakes, ambient pressure air is admitted to the air chamber in the booster, which creates the force that assists you in braking. When you take your foot off the brakes this air is evacuated by the engine. Normally this isn't enough air to make a difference, but if you repeatedly apply the brakes you may admit enough un-metered air (air that didn't go through the airflow sensor or AMM, depending on your car) to affect the running.
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