The brakes will be real hard to push.
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.
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 know who else liked grammar?
I née to know to
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
warped rotors
Generally the brake pedal gets harder to push when braking. You may also hear a vacuum leak when the brakes are applied. And sometimes the will engine idle rough when stopped and holding the brake pedal.
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.
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.
Power assist has a brake booster, which is a vacuum assisted unit. I dont know the exact formula for the multiplying of force, but it at least doubles the effort of the drivers effort on the pedal. Power operated....bend the steering wheel to stop if you're not ready.