brake booster problems

[dmwhiteoak]

I have researched and have seen no sign of my problem at hand. I have been boosterless for two years and have just now installed a good one. When the booster vac hose is connected the pedal will not relieve back up to the position to disconnect the brake light switch. Unless you kinda pop it the brakes will stay engaged and you have to pull the petal up to release them. After much thought Im kinda figuring that fitting that goes to the booster must have a check valve. Am I right or wrong? If I am wrong what would most likely be the issue? At the moment the booster vac line is disconnected and the petal travels all the way up with no issues.

[So Cal Mark]

sounds like an internal issue with the booster. A check valve would only allow assist with the engine off

[narfire]

I guess you know there is an up and down on the booster. This is for the connection to the pedal, not so much for aligning the mounting holes.
Ask me how I know...
Chris

[dmwhiteoak]

Chris I don't understand. The up and down ?

[narfire]

What I found when I replaced my booster last year was the rod lined up better with the pedal when the booster was mounted one side(top-bottom) or the other. I tried rotating the plunger but still was not lined up right and would be difficult to connect. I've had boosters with the vacuum line one side or the other so took a chance and failed the first time. perhaps my brake pedal was out of whack but I turned the booster upside down and the connection lined up way better. Perhaps just unique with my car but I'm happy now.
Weird I know....
Chris

[dmwhiteoak]

When vacuum is applied is the only time the pedal does not retract .It worked fine on the car I removed it from. I will run booster less for now and when time allows I will solve this. That's one thing about these cars, when you change something you never know what to expect.

[vandor]

Do you have a return spring on the pedal? The pin that holds to pedal to the booster's fork has a tab for a spring connection.