Sto Blazer

Tiny
SHERMANRAMSEY
  • MEMBER
  • 1998 CHEVROLET BLAZER
  • 4WD
  • AUTOMATIC
98 s10 blazer brakes stopped working pedal wont push down sshhh sound when I try and sounds like engine revs up. Truck wont stop
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Monday, July 11th, 2011 AT 1:55 AM

5 Replies

Tiny
CARADIODOC
  • EXPERT
Sounds like you have a leaking power brake booster. You still should have brakes if you push really hard on the pedal.
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Monday, July 11th, 2011 AT 2:07 AM
Tiny
SHERMANRAMSEY
  • MEMBER
Not after 10 mph
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Monday, July 11th, 2011 AT 2:10 AM
Tiny
CARADIODOC
  • EXPERT
Not what? No brakes? Does the pedal go to the floor? Is it just real hard to push? What changes at 10 mph?
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Monday, July 11th, 2011 AT 2:23 AM
Tiny
SHERMANRAMSEY
  • MEMBER
Pedal slowly goes down engine revs up I wont even try to go over 10 hard enough at idle spd also the sshh sound
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Monday, July 11th, 2011 AT 3:07 AM
Tiny
CARADIODOC
  • EXPERT
I'm still not clear on what the brakes are doing. The pedal goes down slowly, so are you saying it normally goes down faster or it's going down too far and the car doesn't stop?

If the pedal is going down too far as you hold steady pressure on it, there could be a leak in the hydraulic system. If the brake fluid is low in the reservoir, check underneath for signs of leakage, particularly inside each wheel and along the left side of the car. If the fluid level is good, there could be internal leakage inside the master cylinder.

Another thing you can try is to stop the engine, pump the brake pedal a few times, then see how hard it is to push. With the power booster exhausted of vacuum, the brake pedal will push very hard but the brakes will still stop the car. That will give you an idea of what they will feel like if the booster has failed.
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Monday, July 11th, 2011 AT 6:36 AM

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