Question about 2005 Ford F-150

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F150, 2000, problems with brakes

What is happening when I want to brake, and the brake pad goes nice and smooth, and then in a minute the brake pedal is so hard to push. Also I hear a clunking noise when I brake, and feel that the car is still going when braking. The brake pads are fine. Help!!

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Sounds like the vaccum booster is bad. check vaccum line going to booster for cracks. vaccum booster is located behind master cylinder.

Posted on Dec 15, 2008

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4 Answers

Why is it hard to push on the brakes


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.

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1 Answer

The Brakes locked when going down a hill


the condition you have experienced is called brake fade . It occurs when there is insufficient brake pad to adsorb the heat generated buy the changing of the kinetics energy (spinning) into heat energy by the friction of the brake pads on the disc rotors.. It gets to a point where the pads and discs will not take any more heat so when that happens it does not matter how hard you push the pedal there will be no brakes. To prevent this happening again fit new brake pads and fit new disc rotors. If you are going to be doing steep hill work then get a brake pad suitable for hard work. Talk to a brake shop specialist to get the best pads for the job. Another experience that you will have is when the brakes get hot the pedal goes to the floor. This comes from bad brake fluid and happens when the brake fluid absorbs moisture from the air and the boiling point of the fluid is lowered considerably. The oil boils and the water in the oil turns to steam and you get vapour lock in the system and you will loose brakes as you are compressing steam or air.. The fix for that is to ensure that you change your brake fluid every 12 months.

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I recently replaced all of the break pads (4 wheels all disc) on my 2004 Hyundai Santa Fe. I have a brake, but the pedal goes down too far before gaining hold/stopping the car. I never cracked a bleeder...


the brakes need to be broken in, if you are pushing the pedal hard to try to stop, if the pedal just goes down on normal breaking then theres a problem, make sure the pads are sliding freely, if the pads are tight on the bracket then the bracket needs to be cleaned and lubed, this will make the pedal drop lower than normal, theres no other reason, you never opened the bleeders the pedal should be good, make sure the pads slide freely,

Dec 05, 2010 | 2004 Hyundai Santa Fe

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I changed the front rotors and brake pads once i was done i started the truck and the brake pedal went to he floor and the dash ifo said to service brakes. since than the brakes have been hard and...


It went to the floor because you had to compressed the piston to get it over the new pads and rotors. The brakes need to be pumped up after you replace pads in order for the pistons to come back in contact with the new pads and take up the gap. Pushing the pedal to the floor is never a good idea and a good way to ruin a master cylinder in older vehicles.

As far as the pulsation, have the rotors turned. Make sure the wheels are torqued to the proper spec when you are done (140 lb/ft). Pump up the pedal when you are done and you should have smooth braking.

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Montero SUV - squeaky noise when brake pedal is pushed while engine is idling.


this could be 1 of 2 things either you have a vacuum leak and youre hearing a hissing noise or get under the dash with a can of spray lubricant and locate your brake pedal and all its connecting point and spray them down do it until you are satisfied there is no more noise. cheers

Jan 23, 2010 | 2002 Mitsubishi Montero Sport

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I have a 1998 chevy s10 it has a good brake pedal with the engine off but with it running the pedal go'es to the floor and you can hear air at brake booster


Check for fluid leaks and your brakes. If you see no leaks and your brakes are in good shape replace the brake master cylinder and bleed the system. The air you hear is because the pedal went to the floor. If the booster goes bad the pedal will get so hard you can hardly push it at all. I think you will find if this happened suddenly either you have a major leak or the master cylinder went bad.

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Brakes spongy after shop replaced rotors braked pads on 2001 buic


Sounds like air is still in the brake lines, the air sound that you hear is the power assist, but the brake pedal needs to be "high and hard".

if the pedal goes to the floor, that is not good. Sometimes, when pumping brakes for bleeding purposes, the master cylinder gets damaged, as the piston goes past it's normal "travel zone" and gets damged on deposits.....

Now, with that being said, if everything was perfect, brakes are typically not as firm after replacement, due to differences in new pads/shoes and old rotors and drums. Pedal to the floor, however, is never okay.

Doc

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Hard brake pedal hear air leaking when pedal pushed


When you press on the brake? Have your brake vacuum assist checked. It,s that bigspaceship looking thing between the brake master cylinder an firewall. good luck and be safe.

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