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Nick pitman Posted on Feb 21, 2019
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How to bleed brakes on a Mazda b4000

Have bled brakes,brake peddle rock hard with engine off but with engine running peddle goes to the floor!

1 Answer

Dan Hooper

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  • Mazda Master 4,523 Answers
  • Posted on Feb 21, 2019
Dan Hooper
Mazda Master
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You always start with the brake that is furthest away from the master cylinder. On most vehicles, it is the passenger rear. Bleed until nothing but clear fluid comes out of the bleeder valve and make sure that the fluid does not go empty in the master cylinder reservoir. Then move to the next closest brake, usually the drivers rear, then to the next closest, usually the passenger front, then finally the last brake. If you do not end up with a proper operating brake system, there must be an issue in the system. Bad master cylinder, booster, or ABS system are likely suspects.

5 Related Answers

Monster80

Joe Lamb

  • 463 Answers
  • Posted on Apr 05, 2009

SOURCE: bleeding brake on a 2002 mazda protege 5

Start from the furthest away from the master cylinder and work your way forward..And make sure who is helping you bleed them they hold the brake to the floor and dont let up until you've tighten the bleeder screw..And make sure your master cylinder is full every time you bleed one tire so that you dont run out getting more air in the systems..Hope this helps you and Have A Great Day

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

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pieter dauth

  • 68 Answers
  • Posted on Aug 08, 2009

SOURCE: brake peddle hits the floor when engine turned on

did you set up the brakes make sure that it is set

Anonymous

  • 297 Answers
  • Posted on Aug 16, 2009

SOURCE: Bled brakes but peddle still goes to floor when

Master cylinder is toast.

Anonymous

  • 1 Answer
  • Posted on Oct 10, 2010

SOURCE: I Hanve 1996 GMC 1500

did you try a brake booster ?

Anonymous

  • 145 Answers
  • Posted on Dec 29, 2010

SOURCE: I HAVE A 95 F250

The slave cylinder is the next thing I'd replace.

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Related Questions:

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1answer

Brake pedal goes to floor when engine running but is fine when engine off

bleed the brakes again starting at the longest line at the rear and work forward . The indication is still air in the lines.
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I have a 2003 GMC Duramax i installed a new master cyclinder my brakes hold untill i start my truck then they go to the floor

Bleed the brake system, You should have bled the master cyl on the bench before installation..
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Brake peddle goes to floor. can pump to get "some" braking action but goes to floor again. emergency brake works perfect

have someone pump brakes n hold peddle down while u loosen valve air will come out then fluid tighten valve repete few times on each tire
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I HAVE A 95 F250 AND THE BRAKE PEDAL GOES TO THE FLOOR. I HAVE REPLACED THE MASTER CYLINDER TWICE AFTER BENCH BLEEDING, REPLACED THE BRAKE BOOSTER . BLED THE SYSTEM 3 TIMES AND THE BRAKE PEDAL STILL GOES...

You need to check wheel cylinders, the only way that the brake peddle will go to the floor like that is if there is a lose of fluid pressure somewhere .
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Rusted rear left brake line replaced, fluid drained from master cylinder. Left the line open while I picked up the new line. Bled all four brakes, but the peddle goes to the floor (slowly) with medium...

Did you remember to bleed the master cylinder itself? When the master cylinder runs dry you should start bleeding your brake system at the master cylinder and then continue on to each of the four wheel cylinders.
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We just replaced all the brake lines on our 2000 Concord. We bled the brakes, but still don't have great brakes. Is there steps we needed to take when we bred the brakes. The brake light is also...

When bleeding a break system have one person pump the breaks around 10 times and hold the pressure to the break peddle while the other person loosens the bleed screw......The peddle will then go to the floor..............Hold to the floor until the bleed screw is tightened again and repeat until no air is in the line............Repeat for all breaks and always check the master cylinder for low fluid level and top up.................Hope this helps you out.
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2001 Chev blazer, brakes have been bled, peddle

You probably have air between the master cylinder and the abs pump. Fill the reservior and have someone pump the brake and bleed the primary lines at the abs pump. Good luck.
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Brake pedal still goes to floor 2000 GMC Jimmy

It's very possible to be the master cylinder, the o-rings on the piston could be worn, letting the fluid seep back through instead of getting full pressure through the lines. Could also be the brake booster.
Try changing the master cylinder first, which is cheaper and easier, and see if there is a difference, you'll need to bleed the brakes again.
To check the booster,
With the engine off, pump the brakes until the pedal is hard, then hold pressure on the brake pedal and listen for air escaping, or the pedal goes slowly to the floor, Do that after the master cylinder has been changed, at least that will be eliminated.
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Brake pedal goes to floor after bleeding the brakes many times

start off by pumping the peddle 25 times with engine off ... bleed the abs system (usually has bleeder valves near/on control unit). then bleed the rest as usual with engine off ... DO NOT turn the key on while bleeding abs brakes.
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