Brake booster can leak - both small hard to detect leaks & big leaks (easy because if it leaked a lot) your brake pedal would be really hard to push - just like it is when the engine is off & you pushed on the brakes. If a small eak sometimes harder to tell if it's bad - as brake pedal may "slowly" go down when you push on it. If it is bad the pedal will get harder to push. start engine leave in park hold brake pedal down for 1 minute, if it starts to go down then there is a leak somewhere otherwise it shoukld stay where it was
test the booster with engine turned off, pump brake pedal until pedal goes hard then hold foot on brake pedal and start engine. if booster is working, the pedal will go soft as it should for mormal use. if booster is not working ,the pedal will stay hard
you will have a hard brake pedal
Start the engine and then push the brake pedal down. If it is soft and easy to push then the booster is okay. If booster is BAD the brake pedal would be hard to push.
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The brakes will be real hard to push.
If you do not know how to properly replace brake pads then you should send your truck to a mechanic. Working on your car without proper knowledge could hurt you and the car.
hard brake pedal is the most obvious sign only way i know to test a booster, is to turn engine off. use brakes several times till pedal is hard. then with brake applied,start engine. the brake pedal should then soften.if the pedal stays hard the booster is bad
You did not say what you were working on and that would help. Now I do know that it has to go to a direct vacuum source like the base of a carburetor or the intake manifold vacuum port.
Pour it into the brake fluid reservoir. It is in front of the brake booster. If you don't know where that is then take it to a service center before you have major problems.
the brake booster is located between the master cylinder and the brake pedal. Inside the fire wall. I found it for $85 but i don,t know how to replace it without ripping out the dash. Found a shop that will do the work for $250.
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