Having problems with your 1991 Ford Mustang ?

Brakes go to the floor and have an air sucking sound when you press the pedal. Replaced the master cylinder, new cap and vacuum valve on the booster. Still nothing but it sounds like sucking air in the inside of the car when you hit the brakes. Is there a rubber boot that perhaps makes an air-tight seal that would cause this?

Posted / edited by AnonymousUser on : 22-01-2018

Answers :

You have a leak in the power booster diaphragm...the booster needs to be replaced. It's not a high failure item and can usually be located in most scrapyards.
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