Question about Jeep Grand Cherokee

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Brake pedal started getting soft and stopping is now delayed. it will stop, but have to start braking early and pedal is much lower to floor. Brake light on panel just came on, fluid resevoir is full.

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Sounds like you have a blown brake line or a wheel cylinder,the fluid is staying full because the proportionong valve closed the flow to the rear brakes or the front depending on what line blew,look for a wet line or brake drum ondre the vehicle and that will most likely be your problem,hope this helps

Posted on Oct 12, 2010

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Brake peddle goes soft when i start my car


It is a nomral condition, in every vehicle the break paddle is hard to push before you turn the engine on. But, if you turn the engine on the paddle would go soft.

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2003 Chevy Trailblazer brake pedal not releasing. When turning and brakes tapped briefly they continue to brake until complete stop. When stopped and foot off brake 10 sec delay before pedal releases


Sounds like your ABS unit on its way out.
with the engine off, pump the pedal till its hard. keep your foot on the pedal pushed down and start the engine. your pedal should become light and continue down to the "floor".

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1 Answer

Brake pedal soft


You still have air in the brake system and this becomes evident when the operation of the booster allows the pedal to do down as it is compressing the air in the lines more efficiently than what you can do with your foot. Try starting the bleeding procedure but undoing the lines at the master cylinder and priming the unit first to get the air out of both sides of the unit. Tighten the lines and with the help of a assistant start at the longest line first and work back to the shortest. Booster failure will result in no assistance or engine stopping from a massive vacuum leak when the valves are opened. The abs is just a motor driven pump that supplies pressure to the brake system when the wheel sensors come into operation otherwise the brake pedal pressure is operating through the ABS unit to the brakes. (An ABS is only there to keep the brake pressure constant as the sensor opens and closes a valve to stop the wheel skidding . If it is not working then pressure from the pedal may bleed back leaving you with no brakes.)

Nov 30, 2013 | Dodge Cars & Trucks

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When at a stop the brake will slowly start to cave in


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Feb 12, 2013 | Cars & Trucks

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Vw golf 2000 the brake pedal is to soft when you apply it and seems like is not going to stop but it does, what is the problem?


Not sure if you have done all this.



BRAKE BOOSTER INSPECTION

Functional test:
1. With the engine stopped, Depress the brake pedal several times, then depress the pedal hard and hold that pressure for 15 seconds. If the pedal sinks, the master cylinder, brake line or a brake caliper is faulty
2. Start the engine with the pedal depressed. If the pedal sinks slightly, the vacuum booster is working. If the pedal height does not vary, the booster or the check valve is faulty

Leak Test:
1. Depress the brake pedal with the engine running then stop the engine. If the pedal height does not vary while depressed for 30 seconds, the vacuum booster is OK. If the pedal rises, the booster is faulty
2. With the engine stopped, depress the brake pedal several times using normal pressure. When the pedal is first depressed, it should be low. On consecutive applications, the pedal height should gradually rise. If the pedal position does not vary, check the booster check valve.

Check valve test:
1. Disconnect the brake booster vacuum hose at the booster.
2. Start the engine and let it idle. There should be a vacuum available. If no vacuum is available, the check valve is not working correctly. Replace the check valve and retest.

END TEST

Nov 06, 2012 | Volkswagen Cars & Trucks

1 Answer

2003 chevy impala brake pedal goes to floor when sitting at a complete stop


First, check your brake fluid levels, if it is low then that enplanes your problem. Also, when was the last time you had the brakes changed? if the are worn down, then this will also cause a low fluid level. if the brakes are fine and the fluid level is good and you still have the same issue, then your problem is probably your master cylinder. Brake boosters hardly ever go bad.

Oct 31, 2012 | Chevrolet Cars & Trucks

2 Answers

I have a 1990 GMC Suburban 2500 that has a soft brake pedal which just started happening yesterday. It will stop; however brake pedal goes all the way to the floor. Have added brake fluid with no change....


Because it is the brakes AND it came on suddenly. GET THE WHOLE SYSTEM CHECKED NOW! Have you checked the condition of the brake pads? Heavily worn pads can affect how far the pedal travels before the brakes bite. Is the pedal spongy? There may also be an air bubble in the system so get a good mechanic to check and bleed the brake lines. If these are OK your looking at getting master cylinders and brake servos checked or replaced.

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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.

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1 Answer

Excessive brake pedal travel and 'soft' brakes


the brakes have to be bleed you wrote that when you start the car the pedal goes to the floor that means the booster is working fine take it back and tell them you want the brakes bleed

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