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1993 Chevrolet Lumina poor brakes

Tiny
GEORGE THRONE
  • MEMBER
  • 1993 CHEVROLET LUMINA
  • 3.1L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 111 MILES
I do not think rear brakes are working the way they should.
Tuesday, December 30th, 2014 AT 9:54 PM

9 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Do you have drum brakes in the rear? Also more details please?
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Wednesday, December 31st, 2014 AT 6:31 AM
Tiny
GEORGE THRONE
  • MEMBER
  • 11 POSTS
I have disc brakes all way around. I do not know if I have ABS or not. I do not know what to look for. The rear brakes do not keep the rotors polished like they were being used hard. The front ones are obviously working.
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Wednesday, December 31st, 2014 AT 5:54 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
That doesnt mean the rears arent working does the car stop good?
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Monday, January 5th, 2015 AT 7:24 PM
Tiny
GEORGE THRONE
  • MEMBER
  • 11 POSTS
No! The brake pedal is spongy and I have replaced the master cylinder, wheel cylinders and bled all. I used a power bleeder.
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Friday, January 9th, 2015 AT 2:36 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
You replaced the wheel cylinders or calipers you said you had disc in the rear? Also do you have abs brakes?
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Friday, January 9th, 2015 AT 9:26 PM
Tiny
GEORGE THRONE
  • MEMBER
  • 11 POSTS
First off let me say I am not totally ignorant about automobiles mechanics and such. No I do not have ABS. I replaced the master cylinder, calipers and pads all the way around. I believe if I eliminated the spongy brake pedal I would have the proper amount of braking power that I require. Upon looking at this master cylinder, I have to think that the proportioning valve is located in the master cylinder. Is that correct? Also will the power bleeder take all the air out of the master cylinder or should that be bled separately. Any help you can give me on this matter would be greatly appreciated. Thank you
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Saturday, January 10th, 2015 AT 6:21 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Iam not sure if there is a proportioning valve in the master cylinder. I always bench bleed the master cylinder seperate then install it and bleed the brakes together. Otherwise you could have air trapped.
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Saturday, January 10th, 2015 AT 2:39 PM
Tiny
MAXIMILIAM
  • ADMIN
  • 436 POSTS
Thank you very much for your answers and your time. I guess I will have to tear the master cylinder out and bench bleed it unless I can figure some other way. Anyway thank you!

George Throne
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Sunday, January 11th, 2015 AT 5:12 AM
Tiny
SATURNTECH9
  • MECHANIC
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Your welcome.
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Sunday, January 11th, 2015 AT 1:09 PM

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