need help with my brakes

HONDA PRELUDE
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DMG1978
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I have an 89 Honda Prelude, with 300,000 miles on the car, 150,000 on the motor. I bought it with a failed brake system. I have replaced the following parts.

all four calipers, master cylinder, proportioning valve, front brake hoses, pads.
my problem is when i get a few miles down the road my front brake calipers(right & left) completly lock up and my car comes to a comlpete stop. after a while(few hours)the pressure seems to back off and i can drive it home. what could cause this problem??
I have checked and the calipers are working as they should. I have no problems with bleeding. the brakes work great up until they seize up.

Any Suggestions
Nov 19, 2006 at 3:00 PM
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BRUCE HUNT
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First of all, does it lock up once you put the foot on the brake or do they do it on their own? I would not want to affend you but the bleeding is SOOOOO very important. It is basically a two man job.

When it locks up are you noticing any one side or particular brake that is doing it?

Bleeding!
Nov 19, 2006 at 10:54 PM
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DMG1978
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yeah, the left side more than right, but i have had the system power bled at an auto service center. the tend to lock up on their own, the first time was on the highway, never touched the brakes. I am actually on my third master cylinder, and third proportioning vavle. i am going to try another set of calipers and go from there.
I will definitly take the advice and bleed bleed bleed.

thanks.
Nov 20, 2006 at 11:36 AM
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DMG1978
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i am back to say that i found my problem. My pedal was to far out of adjustment and was sticking. I followed my manual and adjusted it accordingly and so far no stick. I hope this is my cure and i will be able to enjoy my car.

thanks for the help.
Nov 23, 2006 at 10:00 PM