Power booster failure or vacuum supply to booster failure.
Power booster is bad or the vacuum supply to booster is cut off.
You must have air in the system. Get your brakes checked ASAP !
Possibly a bad master cylinder.
The kids bike may be hard to pedal because the tires are low on air, the brakes are rubbing against the wheel, or the chain is rusty and needs lubrication.
try bleeding the brakes or checking the fluid
Do you mean when you push the pedal " hard " you hear noise..........if so could be the ABS..........if not, then please have your brakes checked for safety.
Your vehicle is equipped with abs and anti lock brakes, when applied hard enough the system interprets it as a panic stop and pulses the brakes to prevent lock up and skidding.
no if it is hard to step on, the cable might be wore.
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
Most likely you do not have anti-lock brakes in your vehicle. Other possible answer is that your anti-lock brakes are malfunctioning. If you have anti-lock brakes you should see a mechanic as soon as possible.
push the gas pedal really hard
No, a busted brake booster will not cause the brake pedal to go to the floor. It will however cause the brake pedal to be extremely hard to push. A defective master cylinder will cause what you describe. Replace the master cylinder and bleed the brakes. It can because it happened to me. The booster lost vaccum and the pedal went to the floor. Sorry, you are wrong. The only reason the pedal went to the floor was because the master cylinder failed. The brake booster only boosts the pressure on the master cylinder and allows you to not have to push so hard on the brake pedal. Cars of yesteryear did not even have a brake booster and they stopped just fine albeit you had to push the pedal allot harder than with power brakes. A failing brake booster will not cause your pedal to go to the floor although it might cause it to go lower than normal before the brakes apply. As long as the master cylinder is good you will still have brakes, but you will have to really push hard and might even have to pump them up in order for them to stop the car.