Question about 1994 Ford Thunderbird

1 Answer

Just the other day my brake pedal starting going almost to the floor before the brakes activated... checked brake fluids and its full but i boticed that if the car wasn't on that the brake pedal acted normalyonly moving 1-2inches before i could feel pressure... so why when i turn on the car does the brake pedal just sink to the floor?

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 283 Answers

Given the age of your vehicle and that you do not see any fluid loss, the most likely reason for the brake peddle act this way is because of an internal leak in the master cylinder.
The master cylinder has a piston the operates the brakes when pressure is applied from the peddle. Basically, this piston provides and maintains the fluid pressure because of rubber "O" rings or seals. If the seals are going bad (due to age and wear) the fluid will bypass the piston but still stay in the cylinder and reservoir.
The master cylinder can be rebuilt or new one cost $65-$120 depending on if you have anti-lock brakes. Here is a link to a supplier (with part photos) (Click Here) Labor about 2-3 hours.
J

Thanks for using FixYa!! I provide my answer for free as a public service



A 4 THUMBS rating and POSITIVE Comment is really appreciated for the FREE answering of your question.

Posted on Mar 12, 2011

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Brake system all new but pedal goes to the floor


double check the brake master cylinder and brake piston cylinder.

Mar 11, 2015 | GMC Sierra Cars & Trucks

1 Answer

THE BRAKES- PEDAL GOING TO THE FLOOR - FULL OF FLUID IN MASTER CYLINDER


That sounds like your cups that catch & push the brake fluid are worn out in the master cylinder, get a new master cylinder .

Jan 03, 2015 | Cars & Trucks

4 Answers

Brake pedal goes to floor vehicle still stops


Is the brake light on? Check your fluid level. Pedal going to the floor could be because of a leak in the hydrolic system line, hoses, caliper, wheel cylinders, master cylinder internal and external leaks. Can also be because of over sized drums and/or under adjusted brake shoes.

Jun 13, 2014 | 2000 Chevrolet Blazer

1 Answer

Brake system


You have a leaking brake line or Caliper. You need to fix the hole by replacing parts.

Jun 19, 2013 | 1996 Mercury Mystique

1 Answer

99 f350 diesel truck has brake pedal that goes to floor after a few seconds of applying brakes


check the vacume line to the braking master cylinder if this lose vacuum the peddle will go to the floor and have poor braking.

Aug 13, 2017 | Cars & Trucks

3 Answers

Brake pedal sinks to floor


Losing fluid somewhere or losing pressure in the master. Will need to be serviced by a shop. Can't drive it this way.

Sep 10, 2012 | 2005 Mazda 3 Sedan

1 Answer

II was changing my brake pads and accidently unscrewed the bolt to my break fluid. I finished the pads and went to set the brake and it just went to the floorboard and checked brake fluid. the resivoir was...


WHEN FINISH REPLACING BRAKE PADS.MAKE SURE MASTER CYLINDER COVER ON FLUID LEVEL OKAY.YOU PUMP BRAKE PEDAL UNTIL BRAKE PEDAL GET FIRM HARD.IF BRAKE PEDAL KEEP GOING TO THE FLOOR YOU HAVE AIR IN THE HYDRALIC BRAKE SYSTEM.BRAKE SYSTEM NEED BLEEDING.DONT DRIVE VECHICLE IF BRAKE PEDAL FEEL SPONGY OR GO TO FLOOR.

Oct 20, 2010 | 1999 Nissan Pathfinder

3 Answers

Break peddle to the floor no resistence behind it, and not stopping well, no noise.


First of all, don't drive with the brakes this way...
Sounds like you've lost the hydraulic pressure in the brake system.
Check the following:
1. Open the hood and check the brake fluid reservoir to make sure it's full of brake fluid. If not, top it off with the recommend brake fluid.
2. Try the brake pedal again, with the car running in PARK, press a few times and see if the pedal "firms up".
3. If it does, press and hold the brake pedal with the motor still running. Look to see if the pedal slowly sinks to the floor or if it's a bit "mushy" or feels ok.

If the pedal sinks to the floor, you've got a major leak in the brake system. This could be from one of the wheel cylinders, from the disk brake caliper piston, a damage brake hose, brake line, a faulty master cylinder, power brake booster.
The best way to check is a visual inspection. Look around each wheel- look for fluid leaks, for signs of fluid where you park, on the axles, under the hood near the brake fluid reservoir, etc.
If after the fluid is topped off, you get a mushy pedal, I would suggest getting the brakes "bled". Bleeding the brakes simply means getting all the air out of the brake lines. (Air compresses where brake fluid won't- if the pedal is mushy it's got air.)
If you've not done brake work before, I highly recommend taking it to a local mechanic to help you out. You really want to KNOW that your brakes are going to be there when you need them. So if in doubt have a mechanic check it out.

Jan 18, 2010 | 2001 Toyota Echo

1 Answer

Brake pedal will go all the way to the floor


make sure brake fluid is full. then pump brakes for one minuite check the fluid to see if it went down or stayed full. if it went down then check the system for a leak . if it stays full then you will need a new mastercylender . i dont think you have a vacum problem cause this causes a verry stiff brake pedal not one that goes to the floor

Dec 26, 2008 | 1993 Ford Crown Victoria

Not finding what you are looking for?
1994 Ford Thunderbird Logo

140 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts

yadayada
yadayada

Level 3 Expert

76630 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

fordexpert

Level 3 Expert

5530 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...