Poor braking may be due to severely worn pads (disc brakes) or shoes (drum brakes), however, a common cause of "sudden" hard braking is the power brake booster either losing vacuum or failing, causing the brake sytem to lose the assist the booster provides and requiring a stronger effort by the driver to slow or stop the car by "standing" on the brake pedal with much greater force.
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The most obvious cause for a hard pedal is simply not enough vacuum. Check the brake power booster by pumping on the brake pedal while the car isn't running. Continue pumping until you've "bled off" the vacuum from the booster. Hold the pedal down while you start the car. The pedal should go down a bit more beneath your foot. If it doesn't, then you should examine the connection between the vacuum hose of the brake power and the engine's vacuum.
Replace the brake power booster if the connection's fine, which would fix the hard brake pedal problem.
It may be your calipers need replaced. Check them for signs of wear. Look at the metal spring where the brake pads sit.
Apply tension to the pad and see whether you hear a pop. If you do, the brake pad is moving too much on the bracket. Replace the caliper. This could help the hard brake pedal.
I had my power brake booster go bad and I replaced mine as well as bleed the brakes that when I went and tried them out 'I slammed on my breaks early before getting to close to the light' that my car left skid marks all over that road because the brakes worked like power brakes should and yours sound like your booster was installed wrong or the pads are bad or you didn't bleed all the air out of the line. Your problem you described was like it felt before I replace brake booster ie lousy non power brakes when I had power brakes.
Hello...get the vehicle back to the shop that worked on it....Sounds to me like one or more of the calipers won't release it's grip when you release the brake pedal or the master cylinder is locked...Think about it...it's like driving with your foot on the brake pedal....or maybe your power brake booster...anyway...Get it back to the shop that worked on it and bring your receipts for all the work done...Let me know what happens...I hope this was helpful...PEACE........
not sue u have abs on that model
more than likely break booster
best way to check booster is stop truck pump pedal a few time then put your foot on brake pedal and push down this is with truck stopped ,keeping pedal pushed start engine brake pedal should move down more if booster is working check all pipes tp booster
sounds like brake booster not working
check vacuum hose that goes to booster is ok and not leaking
pump up brake pedal several times
hold brake pedal down
pedal should sink down approx half to 3/4 way down indicating booster is working
if pedal doesnt go down when engine is running booster has leak or no vacuum supply from engine which requires great pedal effort to try and get vehicle to stop.
there is a ground problem, most likely in the tail unit itself, but a ground problem is hard to find and easy to fix. reground the system, the turning unit, and the problem should stop. About the hazards, I don't know...... some times in older cars, that is the way it works. because the brake and hazard element in the bulb is the same and the old cars used a break in the power, but the new cars use a break in the ground. any way, chase the ground down first, it is usually the cause.
this noise is a vacuum leak at the power brake vacuum booster due to a tear in the booster vacuum diaphragm, u should have this replaced ASAP, it the leak gets worse the brakes will become very hard to push and will limit your ability to make a safe and timely stop.