Question about 1993 Jeep Wrangler

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The brake pedal is very soft but I've filled the brake fluid resevoir and the problem is still the same. What could this be-the master cylinder could be problematic. The other symtom is the brake light is on even with the parking brake unengaged. Thanks

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Master cylinder may be leaking...the fact that you needed to re-fill it shows there is a leak somewhere...check under the rear of the master, all lines and the rear wheel cylinders. Bleeding may give short-term relief but if leaking it is also dangerous and needs to be repaired. (if it dosen't start, aggravating...if it dosen't stop, dangerous!!!)

Posted on Sep 24, 2009

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Posted on Jan 02, 2017

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2 Answers

1998 Bonneville SSEi brake system cant bleed


this is best way i know is to fill resevoire with fluid open all bleeders up let it start dripping out of them keeping fluid full in resivoire do this until bleeders leaking real good then shut all bleeders put cap on master cylinder crank car check feel of brakes now if pedal still soft then bleed brakes with car not running check again with car running still soft bleed again with car running

Sep 06, 2012 | 1998 Pontiac Bonneville

1 Answer

Brakes have no pressure


Why did you change the brake pads? Was it because there was already a problem with the brakes? Or just because they were worn out?

It's quite common for the failure of the brake master cylinder during/after bleeding brakes, especially if it's the first time for a long time that they've been bled. The reason is simple: during operation, vehicle braking systems take water from the atmosphere into the brake fluid. This does a couple of things - reduces the boiling point of the fluid; and begins the inexorable process of the corrosion of the inisde of the brake system components. This also happens within the brake master cylinder, and creates a 'use ridge' at the place where the piston stops in normal operation. When you bleed the brakes, you force the master cylinder piston beyond (across) that ridge, and sadly this often tears the fine sealing edge off the master cylinder piston seal, leading to a soft pedal (at best) or one that goes through to the floor (at worst). Obviously I can't tell you what's happened to yours, but it will need someone to check it out properly or you run the risk of having permanently unserviceable (and potentially unsafe) brakes. Good luck!

Jun 11, 2012 | 1996 Ford Explorer

1 Answer

I want the correct procedure to bleed new front brake calipers


You will need to bleed all brakes to renew the fluid and did you change the flexible hoses to the calipers as well as these can close up inside and give the fault of a tight brake ,anyway fill resevoir then assistant pushes pedal down you tighten the nipple a little the allow brake pedal to come and then count to 20 then push pedal down again and open nipple,now on old vehicles you started furtherest away from master culinder but its not that important on more modern cars with tandem master cylinders .What is important is to wait between pumps to allow the cylinder to fill up again

Mar 15, 2012 | Pontiac Cars & Trucks

1 Answer

1992 olds regency ninty eight. Break pedal seems to go down futher than it should when applying. when stopped at a light brake pedal seems to slip going further down some. Checked for leaks on brake lines...


if master cylinder is bad. the pedal will go to floor running or not.when the pedal goes down at a standing stop it is usually the master cylinder thats bad. and losing vacuum. thats if there are no other leaks at wheel cylinders etc. if putting on a new master cylinder, do not forget to bench bleed it! heres how. put the master cylinder in the vise, fill it full of fluid then pump the plunger with a dowel or something soft as to not ruin plunger part.do not let it run dry ! when fluid comes out from master cylinder and no more air is in it. fill it up and put on car. heres what I do! remove the lines from old cylinder on car. as long as you do not lose any fluid doing this, there is no need to bleed air from brakes when done. after on car make sure master cylinder is full of fluid. start the car and pump the brakes a few times, then you should be all set.

Aug 29, 2011 | 1992 Oldsmobile Ninety Eight Regency

2 Answers

I have a 91 passat and the clutch pedal stays on the floor. I bought this car as a project. It has been sitting for 5 years w/ a busted timing belt. Timing is fixed and is running but the clutch pedal just...


If you're talking about an hydraulic clutch system that uses brake fluid:
1. Fill the reservoir with clean brake fluid.
2. Have an assistantpull the clutch pedal up and leave it there.
3. Locate the slave bleeder - the slave is connected to the master, is located on the transmission housing and pushes the clutch release lever).
4. Open the bleeder and have the assistant push the clutch pedal down.
5. Close the bleeder.
6. Make sure there's plenty of fluid in the reservoir
7. Repeat steps 2-4-5-6 until brake fluid comes out with uniform pressure from the bleeder. Non uniform pressure is sign there may be air in the system.
There should be good pressure at the pedal now in the up position. Pressing it should disengage the clutch.

Aug 23, 2011 | 1991 Volkswagen Passat

1 Answer

1996 Dodge Dakota - Brake pedal became very soft . checked brake fluid ,it was seriously low ,added fluid ,now brake light & abs light stay on and the brake pedal is extremley soft.


You have a leaky brake line somewhere. You will need to find and repair it. If you don't see any lines that are wet, you may have to pull the rear brake drums to check the wheel cylinders. They can also start to leak but are not as likely as a line. If your truck is a standard it's possible that your hydraulic clutch uses the brake master cylinder as a resevoir so check that line as well. A soft pedal would suggest that isn't the problem but if the fluid was low enough air could get into the lines. Hope this helps.

May 22, 2011 | Dodge Dakota Cars & Trucks

1 Answer

The front/driver's side of my van is leaking brake fluid very fast.


sounds like a broken brake line or a brake master cylinder problem. the master cylinder has a resevoir ontop were you add brake fluid. Does your brake pedal feel spongy? if so sounds like your master cylinder needs to be replaced.

Mar 15, 2011 | 1999 Plymouth Grand Voyager

3 Answers

I am having an issue where the brake pedal goes all the way to the floor before it will work. From what I understand it may be the brake master cylinder malfunctioning. I am considering replacing it...


Check the vacuum booster first
Shut the car off after it idles for 3 minutes
Apply your foot on the brake and hold
If the pedal seems hard at first and did not go down all the way keep your foot on it for two more minutes
If the pedal gradually goes down to the floor the brake booster is leaking
If not start the car and let idle again
\With the car still idling step on the brake pedal again and hold
If the pedal goes to the floor in a second the master is shot instead

Jun 22, 2010 | 1986 Toyota Camry

1 Answer

2006 toyota landcruiser brake goes limp, pedal goes soft


Replace your master cylinder. It is leaking out of the back of the master cylinder and into the booster. If you unbolt the master and carefully look into the booster, chances are you will see brake fluid. Replace it, bleed the entire system, and enjoy your truck again.

May 31, 2010 | 2006 Toyota Land Cruiser

3 Answers

While driving my 1994 Honda Accord the brakes went out. I can only get the car to stop if I press the brake pedal all the way down to the floor. When the car is shut off and I pump the brake pedal, I can...


There may be air in the lines. Bleed all your brakes starting at the farthest wheel from the resevoir, and finishing at the closest one. Try the pedal after its bled. If the pedal still feels soft or travels to the floor there may be a pinhole leak that may be spraying on the underbody of the car, or the seals in the master cylinder are gone filling the vacuum booster(if equipped). Air compresses more than oil so if bleeding works that may be the problem.

Feb 21, 2010 | 1994 Honda Accord

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