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Brake Pressure Problem

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Old Jan 30, 2002 | 11:07 PM
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SoCo80p's Avatar
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Brake Pressure Problem

ok heres the problem, i put on new calipers, new brake booster and new master cylinder, when we went to bleed the brakes today the rear lines were barely getting any pressure, and the fluid would just drip out, but on the fronts it was under some real good pressure, the fluid would fly out like its soppost to, on the tank to the front lines you could see the pressure shooting up like it should, but just a weak to no shot for the rears, any ideas?








bow to lala racing :hail: :lala:
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Old Jan 31, 2002 | 12:55 AM
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From: Hacienda Heights, CA
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
Look for a pinched line. I pinched one when doing a swap and wound up buying a new ss line.
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Old Jan 31, 2002 | 05:01 AM
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From: Midlothian,VA. 23112-6108
Car: 1982 Z-28
Engine: 5.0 w/ Holly carb
Transmission: TH-700R4
See if you can determine the level or degree of pressure going INTO the proportioning valve.

Thanx,ANDYZ28
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Old Jan 31, 2002 | 12:05 PM
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A pinched line is a good possibility. Another thing that may happen is that the flex-line from the rearaxle to the chassis could be swelled and clogged. I've seen that at least three times(mostly on front brake hoses though). Something to consider checking. If it is clogged, that would explain why both rears brakes were low on pressure.
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Old Jan 31, 2002 | 01:04 PM
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well not just that looking at the reservoir when you press the brake the fluid shoots up hard on to the front brakes but does next to nothing for the rears, think that is a line problem?
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