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| Brakes, what am I missing? (Page 1/1) |
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Kappy
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MAY 08, 05:53 AM
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86 V6 auto, 49k miles. Had all 4 calipers & hoses replaced, brakes feel soft. Had them power bleed again, still soft. Havn't tried it, but I don't think they will even lock up. What am I missing?
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mcguiver3
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MAY 08, 07:41 AM
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Master cylinder.
With that much done to the system it probably went dry at some point and will need a bench blead.
Or it needs a rebuild/replacement.
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olejoedad
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MAY 08, 07:54 AM
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Do you get any change in pedal feel when you start the car?
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fierofool
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MAY 08, 07:55 AM
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How are your emergency brakes? If they weren't adjusted properly at the calipers, the brakes will be soft.
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theogre
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MAY 08, 02:18 PM
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| quote | Originally posted by fierofool:
How are your emergency brakes? If they weren't adjusted properly at the calipers, the brakes will be soft. |
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The brake pedal will be Low but most times Not Soft when the rears have this problem.
Rear brakes will auto adjust when the rear piston works. Any other method needed to "manually" adjust parking function on new/rebuilt calipers are a Warning the replacement caliper(s) have problems.
Air in MC is possible when lines are allowed to Drain for an hour or more. Faster if MC tank has low fluid or Fiero has Sunroof because Tank is very small for front section. Standard Bleeding by any method often won't help. Might jack the rear of car to level out the MC to MC front is a bit low but may not help either.
Bad MC is also possible. There are seals inside that can fail w/o leaking externally.
DIY rebuilt of MC is a bad idea. Only replacement if your MC is bad.
Booster won't cause soft pedal. Booster problems will cause a Harder to Very Hard pedal. Very Hard like engine is off.
See my Cave, Quick Take-up notes, Bleeding MC notes and Rear Brakes.------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave
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Crasian
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MAY 09, 08:10 PM
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Have you tried a NEW master cylinder??? I have encountered a brake bleeding problem only once and it was that...
-Cr[This message has been edited by Crasian (edited 05-09-2019).]
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olejoedad
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MAY 09, 08:22 PM
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Kappy, people here would like some feedback. We are here to help you out!
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