Question about 1991 Nissan Pickup

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Brakes go to floor, I replaced brake pads, master cylinder and calipers. We have bleed the brakes and bleed the brakes and still pedal goes to the floor.an my anti brake light is on What are we missing? There is no flid leaking anywhere! i need help asap

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Hi chances are the master cylinder still has air in it.If thay put plastic bleeder hoses and fittings in there for you just throw them in the trash.go to your local parts store and buy steel lines to for it,you may need an adapter for one of the ports. and re bench bleed your master cylinder.You could have air traped in the system too.A vacuum pump with a brake bleed kit work's great for this.Thay are 24.99 at harbor freight I just baught one from them.If you don't have a harbor freight in your area,thay are on line at www.harborfreight.com. Hope this helps you.Thank You for using fixya....iluv2fish.......Ray.......

Posted on Jul 09, 2010

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I have replaced 3 disc brake calipers on my 2001 pt cruiser. after bleeding all 4 brakes 3 times, I started the car and brake pedal goes to floor. is my brake booster shot?


Michael:

You must start bleeding the brakes at the wheel farthest from the master cylinder (usually the right rear), then the next farthest from the master cylinder, then the next, then the closest. If your master cylinder is at the left front of the car, start with the right rear, then the left rear, then the right front, then the left front. If you don't bleed the brakes in the correct order, you are just shifting the air in the lines from one line to another. Make sure that you close the bleeder before letting the brake pedal up, and the engine should not be running when you bleed the brakes... Make sure that the emergency brake is off. Make sure that the master cylinder does not run out of brake fluid at any time that you are bleeding the brakes.

Jan 24, 2016 | 2001 Chrysler PT Cruiser

1 Answer

Why wound brakes work?


Lots of parts replaced for no reason,it seems

All you have to do is learn how to bleed brakes

That is the only problem

Oct 02, 2014 | Cars & Trucks

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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.

Dec 18, 2010 | 1997 Chevrolet K1500

2 Answers

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.

Oct 18, 2009 | 1994 Chevrolet S-10

3 Answers

Replace brakes. now they go to the floor. bled air


When you fixed the brakes, did you take the lid off the master cylinder. I just wonder if you spilled out your brake fluid. The only reason the pedal should go to the floor is if the brake fluid is gone or the master cylinder is not working. Check the fuse. Check the brake fluid level. The pedal only goes to the floor if there is no back pressure in the lines between the master cylinder the lines to the brake pistion on the calipers. Please give me a good ratin and keep me informed.

Jul 07, 2009 | 1999 Cadillac DeVille

1 Answer

Brakes to the floor(almost) 99 blazer


bleed the brake again. if the pedal goes to the floor with little resistance, then the master cylinder is your problem.
the shim is to depress the noise when you applied the brake. you can skip that, if the brake works without it.

Apr 29, 2009 | 1999 Chevrolet Blazer

3 Answers

Just replaced master cylinder on 1990 aerostar and bled the brakes, still the pedal goes to floor and i have no brakes


Did you bench bleed the master cyl. before installing it? then when you installed the new master, did you bleed all 4 points? If yes, then check all for points for leaking caliper/s and leaking wheel cylinder/s. If the van has ABS, check the valve body for a bleeder screw and see if air bleeds out of it. If you've checked everything twice and did everything right then your new master cyl. may be defective.

Apr 29, 2009 | 1986 Ford F 250

1 Answer

No brakes


Add brake fluid in master cylinder.

Feb 22, 2009 | 1989 Chevrolet K1500

2 Answers

Just replaced the calipers and blead the brakes. Pedal still travels clear to the floor.


Did you bleed the wheel furthest away from the master cylinder? THen next furthest, to closest last. Did u make sure the master cylinder never got low enough to draw in air? To bleed, Pumo brakes 3x, holding pedal down 1/2 way, while bleeder is opened, let air/fluid flow, shut bleeder as flow diminishes so no air gets in the line. Is the car running when u bleed brakes? It should be. If u are doing all of this u should feel your pedal coming back (getting firm). Let me know how you make out. countrycurt0

Sep 21, 2008 | 1998 Mercury Mystique

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