Question about 1989 Chevrolet Silverado 2500

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Brakes i have replaced every component in my brake system and still have spongy brake pedal. no air in lines. replaced booster, master cylinder, porportional valve, abs hydrolic valve, lines, calipers, and pads. brakes work but are spongy and when you apply them. some pressure is coming back up master cylinder and the pin in porportional valve is pushing out when brakes are applied.

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  • Anonymous Mar 22, 2014

    spongy break pedal need help to find out what the problem

  • Anonymous Mar 28, 2014

    replaced master brake cylinder now the brake light on dash board stays on

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Flexible brake lines are probably balooning out causing pressure not to build up, replace flexible to the calipers.

Posted on Mar 03, 2009

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...go to your parts store and ask for a brake booster bleeder kit and bench bleed the master on the car...if the pedal is still spongy then YES its the master

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