Question about 1999 Jeep Cherokee

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1999 4 x 4 JEEP GRAND CHEROKEE 114,000 MILES. I HEAR AIR COMING FROM UNDER THE BRAKE PEDAL. IT STOPS WHEN I HIT THE BRAKE PEDAL. PLEASE HELP

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That is avacuum leak there isa hose down there about a quarter inch thick going to a plastic switch it is common for that switch to leak it needs to be replaced .while the engine is running get down there and listen u will here it and see hose also if u spray it with asteady mist from a squirt bottle at it the noise should go away and the engine rpm should change that way u will know what part it is also u will be able to change it urself and probly save urself 50 to 100 bucks labor it will have the part number on it

Posted on Sep 14, 2012

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Disconnect and plug the vacuum line going to the brake booster under the hood. Now test for noise. If the noise has stopped then your power brake booster may be leaking.

Posted on Sep 09, 2010

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