Where is the hose thats making noise how to fix
If the vacuum (noise) is coming from the inside of the vehicle there is a good chance that it is the brake booster that is connected behind the brake master cylinder on the firewall....
You can test it by locating the vacuum booster tank behind the brake master cylinder. Disconnect the vacuum line should be a 3/8 tube connected to a right angle button that goes into the left side (if your looking at it from the front of the vehicle) disconnect the tube and block it off.( the vacuum tube) start the engine get inside the vehicle and see if the noise is still there when you push the brake. If it's not the cannister is your problem and is easy to replace.
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SOURCE: brake air leak noise
check under dash for a leaky vaccum switch. if booster was faulty brake pedal would be very hard to depress.
SOURCE: no brakes after changing brake caliper & bleeding system
Sounds like you still have air in your brake lines. Make sure all your brake lines are tight. Then bleed again. Bleed the trouble side first, meaning right side, then go to front left, back left then back right, make sure that your brake fluid is also full
SOURCE: rear brake grinding noise when pressing on brakes
The grinding noise in the rear brake drum means that brake shoes are warn out and the metal part of the shoe is touching the drum. You need to replace it asap as it will damage the inner part of the drum and than replacing shoes will not help without skimming or replacing the drum.
SOURCE: ford f250 diesel . front brakes come on when
has anything been done with master cylinder or booster or brake light switch?? if the adjustment is off, the master will not release the brakes even if the pedal is back, although its rare if nothing has been replaced recenlty, next time the brakes drag, loosen the master bolts (2) about 1/8" and see if they release, if so either the adj is off or the master cyl is bad.
SOURCE: my power brakes failed and i can hear an air leak,
IF YOUR HEARING IT IN THE CAB YOU MAY HAVE A LEAK AT THE BOOSTER WHERE THE PEDAL ENTERS IT GET UNDER THE DASH AND PRESS THE PEDAL BY HAND AND SEE IF YOU CAN HEAR IT COMING FROM WHERE THE PEDAL ROD GOES INTO THE FIRE WALL
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