Brake issue - only right rear works

Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's, Olds 98 91-96, Buick Lesabres and Park Avenue 91-96. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
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ColdScrip
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Year and Trim: 1992 Pontiac Bonneville SSEi - L67 Series 1 - 131,000 Miles.

Brake issue - only right rear works

Post by ColdScrip »

Hey all I just picked up another 92 SSEi. The car runs fine but it has a break issue. A brake line rusted away and the previous owner had to replace it. The line he replaced went to the ABS control unit in the engine bay. After bleeding the breaks MANY times the brake pedal is extremely hard.

The issue however is that only the right rear brakes work. The pedal will not go down all the way at all. It almost seems like perhaps some dirt got into the line when he was changing it and now the fluid won't go to the other 3 wheels.

Going by that description, in particular how only the right rear wheel brakes, does that help you guys determine where exactly the blockage must be? Could that module itself have failed thus blocking the flow?

The traction off light is on and stays on. ABS light is NOT on.

Thank you all very much!
1992 Pontiac Bonneville SSEi - L67 Series 1 - 131,000 Miles.
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Mechanical Mike
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Re: Brake issue - only right rear works

Post by Mechanical Mike »

Which brake line was replaced? Was the engine running while the brakes were being bled?
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bobfather99
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Re: Brake issue - only right rear works

Post by bobfather99 »

Had an old T-bird years ago which had the hard pedal problem. Was the brake booster.
Try that maybe???
1995 White Bonneville SE

188340 Miles as of 06/07/10, still running.........

LIM/UIM Work done 4/23/07 at 145000 miles...
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J Wikoff
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Re: Brake issue - only right rear works

Post by J Wikoff »

Try unplugging the ABS unit and see if anything changes.
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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
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irish91983
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Re: Brake issue - only right rear works

Post by irish91983 »

i was having kinda the same problem. I was getting only the front dirvers caliper to work and after i put a used master cylinder in and bled the system it was fine untill the use one went but i got a brand new one and bled the system again and all was fine..to me it kinda sounds like it could be the master went bad
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2001 SSEi Bumbles
Angel Eyes ~ Cleared Corners ~ Tinted Tails ~ Intense FWI ~ 20% Tint ~ 180 Drilled T-Stat ~ GXP Brake & Suspension Upgrade ~ Alternator Rewire ~ Intense Shift Kit ~ Headers ~ Tr 6's

1992 Bonneville SSEi (Sold)
Fan over ride~NGK Tr 55's~180 Drilled t-stat~Clear Corners~Angel Eyes~Tinted Tails~Magnaflow Cat
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