Brake pedal depresed and hissing sound

Tiny
JOSHUAFENDER755
  • MEMBER
  • 1998 PLYMOUTH VOYAGER
  • 3.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
I recently changed my brakes on my voyager and after about a month I noticed that I was loosing brake power and there is a hissing sound when I press down on my brakes. The brake fluid level is normal and the pads were installed correctly. Please help me to locate and fix the problem. Thank you
Monday, August 4th, 2014 AT 10:57 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
When you experience the problem, is the brake pedal harder to push?
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Monday, August 4th, 2014 AT 7:41 PM
Tiny
JOSHUAFENDER755
  • MEMBER
  • 34 POSTS
No the brake pedal is not harder
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Monday, August 4th, 2014 AT 8:08 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
I believe the power brake booster is bad. It is vacuum operated and mounted behind the master cylinder. Open the hood, start the car, and have a helper depress the brake. See if that is where the hissing is coming from. Also, check the vacuum hose between the booster and the engine intake.
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Tuesday, August 5th, 2014 AT 6:33 PM

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