Posted by C Knight on October 04, 2009 at 15:45:01 from (70.246.172.10):
I am working on a 1974 Chevy C-60 vacuum brake booster, I have replaced the master cylinder and the vacuum booster, the brakes work but the booster will not work, it has vacuum to it and when I push the brakes it relieves pressure through the relieve (the bottom black plastic outlet) This is the second booster I have installed, thinking the first one was defective. Any help would be greatly appreciated.