Question about Volkswagen Passat

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Every now and then the brake pedal is hard to press down,which means i cant stop or slow down very well.i will take it to a garage to sort but i would like some idea of the cause so i don't get ripped off with paying for parts i don't need.

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Likely a vacuum leak or a bad master booster. Your power assist works by vacuum boost, if you have a sporatic leak, this could cause an intermittant issue. If no leak is present, you may have a booster issue. Good Luck! I hope you find this to be very helpful!

Posted on Feb 07, 2010

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1 Answer

Brake problems


from your description , the problem is in the brake booster
nothing should have popped out as boosters either have the link back to the pedal or a rod from the pedal that goes into the booster
the valve as you call it could be the unit that controls the amount of vacuum needed to operate the booster diaphragm and with that not operating correctly you have no boost assist for the pedal

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1996 Buick Park Avenue Ultra making a hissing noise when I press Brake Pedal. Have to Press super hard to stop or slow down.


Sounds like a possible air pocket in the braking system. Do you know how the bleed the brakes? They may need to be bled. Also, if you've added brake fluid recently, and didn't put the cap back on, it could create a suction. Another note is to check the cap to the brake fluid reservoir. It's rare, but, it could be bad.

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Hello...get the vehicle back to the shop that worked on it....Sounds to me like one or more of the calipers won't release it's grip when you release the brake pedal or the master cylinder is locked...Think about it...it's like driving with your foot on the brake pedal....or maybe your power brake booster...anyway...Get it back to the shop that worked on it and bring your receipts for all the work done...Let me know what happens...I hope this was helpful...PEACE........

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1 Answer

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1 Answer

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1 Answer

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1 Answer

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When was the last time you changed the front brake pads?
Try this:
Keep the brake pedal pressed down and start the car, after it idles for about 10 second let go of the pedal. If the light comes on just as you leave the pedal - try pumping it a few times, turn the car off and pump the pedal some more until it becomes real hard.
Then, keeping your foot to the pedal, start the car.
Idle for about 10 seconds, let go of the pedal and press it again rel fast.
If the light doesnt come on again - it means you have a leak of some sort or that the main brake pump should be replaced.

Good luck.

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1 Answer

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you could have a brake booster issue. you can do a simple test on another car by leaving the engine off and press the brake repeatedly 3 or four times will use up the vacuum in the brake booster. Once you have done this does it feel like the brake pedal in your van?

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