soft brake pedal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

DMO · 03-27-2017, 11:45 PM

I have a 66 with disc brakes all around, booster, prop valve. I have bled the brakes to a descent pedal with the truck is not running. When running, the pedal is weak. If you pump the pedal while running it will build and stop the truck but not effectively. there are no leaks.
Side note: the piston coming out of the booster is not to far out so I know it's not engaging the master cylinder. any idea what the problem could be?

Thanks!
DMO

03-27-2017, 11:45 PM	#1
DMO Registered User Join Date: Apr 2014 Location: Denver CO Posts: 26	soft brake pedal I have a 66 with disc brakes all around, booster, prop valve. I have bled the brakes to a descent pedal with the truck is not running. When running, the pedal is weak. If you pump the pedal while running it will build and stop the truck but not effectively. there are no leaks. Side note: the piston coming out of the booster is not to far out so I know it's not engaging the master cylinder. any idea what the problem could be? Thanks! DMO



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