Question about 2002 Volkswagen Jetta TDI

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Brake vacuum not working

No brakes very hard to puch

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Check the pipe from the vacuum pump/inlet manifold to the brake servo for any leaks

Posted on Nov 27, 2013

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4 Answers

Why is it hard to push on the brakes


The most obvious cause for a hard pedal is simply not enough vacuum. Check the brake power booster by pumping on the brake pedal while the car isn't running. Continue pumping until you've "bled off" the vacuum from the booster. Hold the pedal down while you start the car. The pedal should go down a bit more beneath your foot. If it doesn't, then you should examine the connection between the vacuum hose of the brake power and the engine's vacuum.
Replace the brake power booster if the connection's fine, which would fix the hard brake pedal problem.

It may be your calipers need replaced. Check them for signs of wear. Look at the metal spring where the brake pads sit.
Apply tension to the pad and see whether you hear a pop. If you do, the brake pad is moving too much on the bracket. Replace the caliper. This could help the hard brake pedal.

Jul 09, 2014 | 2000 Isuzu Rodeo

1 Answer

Hard pedal on a 1968 cadillac and brake light comes on


The most obvious cause for a hard pedal is simply not enough vacuum. check the vacuum. please go to this site for info on hard brake pedal= .mpbrakes.com/techtalk/how-to-series/how-to-diagnosing-a-hard-brake-pedal Goopd-Day!

May 21, 2014 | 1970 Cadillac Fleetwood

1 Answer

Why is it so hard to apply brake pedal?


_______power brake booster, check vacuum to booster and the check valve for brake booster. primary symtom is high hard pedal that requires greater then normal pedal pressure to stop car. testing booster= pump brakes several times with engine off to deplete stored vacuum. turn on engine with pushing slightly on brake pedal. you should be able to feel the pedal fade away a bit, and then become firm. But not hard. if you feel nothing at the pedal when engine starts. Brake booster is not working. Good-day! make sure vacuum is going to booster with engine running. it may just be a bad vacuum line or check valve.

Apr 30, 2014 | 1984 Buick Skyhawk

1 Answer

Clogged line


When your brake pedal is hard, you may need to check your brake booster and the vacuum line to the brake booster if their is sanction, if their is sanction in vacuum pipe to the brake booster you need to have your brake booster replaced.
You also need to check your vacuum pump and the piping.

Oct 18, 2013 | Nissan Cars & Trucks

3 Answers

Are there vacuum hose on the brakes hydraulic system?


NO. the vacuum is used to make the brake pedal easy to push, power brakes. the pedal would be hard without vacuum, that is why the pedal gets hard with the key off and engine not running. the problem you are having is more of a hydraulic problem.
Have the brakes checked asap. the brake system may have a leak causing the pedal to go low. check the fluid level and if it is low or empty then there is a problem, could be a rotted brake line leaking or a wheel cylinder leaking.

Dec 07, 2012 | 1997 Ford Probe

1 Answer

Brake pedal hard to push in on 1981 Ford F 100 what cause that


A hard brake pedal is caused by a failed and leaking vacuum diaphragm in the power brake vacuum operated booster. Another reason is loss of vacuum to the brake booster, buy you should hear a loud sucking noise, also the 3/8" vacuum hose can collapse from age check that as well.

Feb 24, 2012 | Ford F-100 Cars & Trucks

1 Answer

Brake booster appears not to be working properly. brakes work ok for 1 or 2 apps then pedal gets hard. cannot hear any vacume leaks. the car does have a vacume switch in the booster


the booster is the problem, or a hole or leak in vacuum line to booster check the check valve also ! from manifold. heres the symtoms of a bad brake booster. primary symtom is a hard pedal on application, to test booster. pump brakes several times with engine off. to deplete stored vacuum. turn on engine with pushing slightly on brake pedal. you should feel the pedal fade away abit and then become firm. but not hard. if you feel nothing at pedal when engine starts, brake booster is not working! check the vacuum lines first!!

Jun 11, 2011 | 1985 Pontiac 6000

1 Answer

Air leaking thru brake rod in firewall raising idle of motor when brakes applied vey hard pedal


You may have a vacuum leak in the master cylinder or vacuum reservoir. This would cause the idle to increase and also the brake pedal to be hard hence there is not enough vacuum assist for the power brakes. First check the large vacuum line leading to the brake reservoir for leaks but more than likely the master cylinder will need replaced. With today's ABS brake systems it takes special equipment to work on the brakes so it will need to be repaired by a qualified shop.

Feb 07, 2011 | 1987 Chevrolet S-10 Pickup

1 Answer

My 2004 prius abs and brake light came on and the the brakes became very hard and constant beeeep noise, so i would shut the car off and pump the breaks and it would work fine so i decided to bleed the...


well, a hard firm pedal, usually indicates a bad brake booster or a vacuum leak to booster or the vacuum check valve, on booster. TO TEST BRAKE BOOSTER; pump brakes several times with engine off to deplete stored vacuum. turn on engine with pushing slightly on pedal. you should feel the pedal fade away a bit and then become firm, but not hard. if you feel nothing at the pedal when engine starts the booster is at fault. good-luck !!

Feb 03, 2011 | 2003 Toyota Prius

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