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mikhelto Posted on Jan 28, 2014
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F150 brake pedal floor

2003 f-150 brake pedal suddenly went to floor checked and rear brakes aren't working replaced master cylinder still no rear brakes

1 Answer

atholis

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  • Expert 56 Answers
  • Posted on Jan 29, 2014
atholis
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Check that the line splitter box in the back is not plugged that could be the problem if not then check that the wheel cylinders are not bad also.

5 Related Answers

raymundo_mnd

  • 10 Answers
  • Posted on Oct 12, 2008

SOURCE: 2001 Mustang GT rear brake job

yep this is a two man job, onece you get air in the lines is better to do all four, my has abs and i was able to do it, but next time don't take anylines lose just turn the piston clockwise and you should be able to push it in.

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Anonymous

  • 1 Answer
  • Posted on Nov 24, 2008

SOURCE: 94 S-10 Chev Brake problem

This is an easy fix un plug the abs sensor from spindle abs light will come on but the brakes will work only abs will not

Anonymous

  • 113 Answers
  • Posted on Jul 20, 2009

SOURCE: Brake Pedal goes to the floor in my 1990 Chevy C1500 Scottsdale

do you have a self bleeder kit? first off, you have to bleed the master cyl back into its self and the combination valve before you go to the wheels. when you do that, I think you will find that you have air in the lines. disconnect both brake lines from the master cyl and put the bleeder kit fittings on the master cyl, then put the rubber tubing with the kit on the fittings and submerge it in the brake reservoir. make sure its full. then pump the pedal until you get a hard pedal. if that is the case, reconnect the lines to the master, then have an assistant pump up the brake pedal with the engine off, and bleed the combination valve which should be connected to the master by steel tubing. pump it up, then hold it down, and crack the fittings loose, one at a time until the pedal goes about half way down, but do not release the brake pedal until the line is tight again, otherwise you will **** air in the lines. after you do all that, go to the farthest caliper or wheel cylynder from the master and bleed that with the same technique,and dont release the pedal until you close the bleeder screw. unless you have a major prob, this will work.

emissionwiz

Marvin

  • 85242 Answers
  • Posted on Oct 18, 2009

SOURCE: brake pedal dropping to floor

do u have the antilock brake bleeding tool? if not you will need to have the dealer bleed the brakes, the ABS control valve must be electricaly held open to bleed the brakes there of course is a special tool for this.

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Anonymous

  • 12 Answers
  • Posted on Apr 21, 2010

SOURCE: brake pedal goes to the floor

check vacumn and\or connections to the vacumn boost cannister.

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0helpful
1answer

No brakes on a 1986 honda accord

Did you get a good bleed with fluid coming out at all four wheels? If they bled good, and the pedal still goes to the floor, you need to check the brake master cylinder-it is probably shot with an internal leak. An internal leak will not let fluid pressure build up, so no brakes.

Did you keep the brake fluid reservoir from going dry while bleeding? If it went real low, air might have got back into the lines.

It is not uncommon when bleeding brakes on an older vehicle for the master cylinder to suddenly develop an internal leak and require replacement . Here's why: pushing the pedal all the way to the floor causes the master's piston to push in farther than ever before. The rubber cups then travel over a section of the cylinder not usually touched by the cups-old fluid can develop a crud there and when the piston pushes over it, the cups can get ruined. To avoid this when bleeding brakes, put a short piece of 2X4 wood block under the pedal. Then the pedal will not extend the master's piston beyond it's normal travel. Of course on a new master cylinder, you do not have to do this. A new master cylinder does require bench bleeding before installing, however, to ensure no air pockets develop from there.
0helpful
1answer

My brake pedal went to the floor, brought it in...They told me it was the Master Cylinder. They changed it and put in a brand new master cylinder but it still seems like the brake pedal goes further t

The extra brake travel can be;
1. air still in the brake lines and need bleeding
2. if there are brake drums on the rear they may be out of adjustment
3. if there are warped brake disc or caliper problems that will add to the brake travel
0helpful
1answer

The brake does not work , there are times when it become soft an goes directly to the floor. it does not maintain preasure

If the ABS lights aren't on, then usually it is a normal brake problem.
Could be a faulty master cylinder, might be fautly/leaking wheel cylinders if it has a drum brake rear.
Disk pads might be worn right down and need replacing.
Have someone to pump the brake pedal while you look under the car from the front and rear, look at the inside of both left and right tyres near the bottom. If you see fluid then the brakes are leaking.
The flexible brake lines might be perished and swelling, this will often cause the pedal to go flat to the floor.
0helpful
1answer

I have a 98 ford F150 4x4 and the brake pedal lights had been staying on after i stopped and shut down the truck.Had to pull pedal up to shut them off. today i noticed a shaking in rear brakes and pedal...

you may have a bad master cylinder that is not pushing the brake pedal to the stop when not breaking.in other words the master allows the pedal to rest lower as it doesn`t have sufficeint residual pressure to push the pedal back,or the pedal is catching on something not allowing it to return to its rest position.this can cause the rear brakes to apply slightly as the pedal not being all the way in the rest position is applying just enough pressure to the system.if the pedal is going all the way to the floor then you need to check for a fluid leak in the system including the master cylinder(internal leak)if no external leak is found.
3helpful
2answers

My 1997 chevy 1500 z71 brakes suddenly going all the way to the floor. Checked brake fluid and it was low. Could be wheel cylinder? Master cylinder? or ?

well, check the brake lines for leakage after adding brake fluid to the full mark. If the brake pedal goes all the way to the floor, it's likely there is a leak somewhere after the master cylinder. If the pedal gets hard after adding fluid, and pumping it several times with the car off, then the master cylinder is still ok.

If air has gotten into the master cylinder, it may have to be bled out on a bench, or using a scanner if that's the way your vehicle is.

Bleeding the Brake System (ABS) Auto Bleed Procedure NOTE: Perform a manual bleeding procedure. If the brake pedal height and firmness results are not achieved, perform the auto bleed procedure below.
NOTE: Perform this procedure when replacing the brake pressure modulator valve or electro-hydraulic control unit.
  1. Perform the manual brake bleeding procedure. Refer to Bleeding the Brake System (non-ABS).
  2. Check the master cylinder fluid level often to prevent running the system dry.
  3. Press the brake pedal firmly and run the Scan Tool Automated Bleed Procedure (for Gas engines) once, or the Function Test (for Diesel engines) four times. Make sure to release the brake pedal between each test.
  4. Perform the manual bleed procedure again. This should remove the remaining air from the brake system.
  5. Bleed the system as many times as needed to obtain the appropriate feel of the brake pedal.
0helpful
1answer

I have 2003 f150 fx4 4 door.4 wheel disc. I had a brake line break on the driver side front. I ended up replacing the entire brake line. I have tried bleeding the system but can't seem to get pressure to...

when the brake pedal went to the floor, most likely the cup in the master cylinder went bad.. as long as you cant find any external leaks, replace the master cylinder.
0helpful
1answer

Brake pedal goes to the floor

check vacumn and\or connections to the vacumn boost cannister.
0helpful
2answers

The brake pedal is fine with engine off. When started the pedal drops almost to the floor.Fluid level is fine, I have jacked up all 4 wheels and checked if the brakes are working- they are.....

the master cylinder has a bypassing issue. double check your rear brakes for proper adjustment and if good, replace the master cylinder and bleed the system. happy new year
0helpful
1answer

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.
0helpful
1answer

1991 nissan stanza brakes

Your master cylinder rear seal is most likely shot. Check to see where the fluid is actually leaking from. If it is coming from the rear of the master cylinder, flush against the brake booster, replace the master cylinder.
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