Question about 1995 Mercury Sable

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The sable brakes well first application then if applied soon after have no assist

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Check the large vacuum hose on the vacuum booster,unplug it from booster and make sure it is getting alot of vacuum from the engine intake,if you have a blockage in the hose that will give you this problem,if it is ok,reconnect hose and start car,listen closely as you push down on the brake pedal,to see if you can hear vacuum leaking from under dash,if you do the diaphram in the booster is cracked and you will need to replace the booster.and even if you don't hear vacuum inside you will need to replace it

Posted on Dec 11, 2009


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