In a message Stephen writes: >I have a servo/vaccuum assist >master cylinder after filling and bleeding the system I decided to take >it out. Well when I use the brake it lugs down the engine and will >quickly kill it. It sounds like either the vacuum diaphragm in the servo has got decent sized hole in it, causing a massive vacuum leak or the one-way check valve (located on the line near the manifold) has failed. Replace the check valve (about $10 new) and see if that solves it. If not, maybe it's time to replace the vacuum line or the booster/servo unit. Jim / BusBoys@aol.com
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