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Old 12-10-2018, 07:53 PM
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64nailhead 64nailhead is offline
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No rear brakes on 1st pump

As the title describes and at the same time the brake light will come on. Also the brake pedal is a little deeper than normal. If I pump the pedal twice or more, then all is well.

My guess is the proportioning valve is not functioning correctly, but I already guessed at a master cylinder and was wrong. So I figured I'd ask the experts before I guess poorly ..... again lol.

Vehicle is a '90 GTA Firebird with stock 4 wheel discs.
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