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Re: How much time before complete brake boost failure?
Posted by saabdoc [Email] (more from saabdoc) on Tue, 7 Jul 2009 20:26:53
In Reply to: How much time before complete brake boost failure?, davec, Tue, 7 Jul 2009 19:53:05
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Did you check the vacuum pipe between the intake manifold and the brake booster to see if its cracked or broken? That's the #1 cause of of no brake booster.
If its not the vacuum pipe then its probably the booster. If you have a engine with a vacuum pump (cars with auto trans) and the booster has failed, you need to check if the booster is filled with oil. When the oil seals leak on the brake vacuum pump, the oil will work its way to the brake booster and fill it with oil causing the seals to fail. The easiest way to check for oil in the booster is remove the vacuum pipe at the booster the stick a long thin object in the booster toward the bottom of the booster (I usually use a long zip tie) If theres oil in it, it will show up on the zip tie like a dip stick.
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