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Pajero, year2003, 3.2DiD,

Brake pedal become hard to push, alarm sound signal is on, perhaps electrical signal is not in. No pressure in system.

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Hi, when the brake pedal is hard check the pipe from your booster to inlet manifold. Or from the rear of your alternator to the brake booster.

Posted on Jul 19, 2013

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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

Hissing sound brake related


hissing sound is a vacuum leak somewhere on the power assist part of the system as in a bad booster..try this test..with the car off..push the brake pedal down a few times and release all the vacumm and see how far the pedal goes down..after a few pumps with your foot it should become hard and drop just a bit..once it feels"solid' or hard..hold the pedal down with moderate pressure.. and start the car back up..the pedal should drop a bit further but less than halfway.. if it drops further it needs attention..good luck especially if it goes almost to the floor..

Dec 09, 2013 | 2007 Toyota Prius Hybrid

1 Answer

Brake pedal hard


Hi P, The most usual cause of the brake pedal action becoming hard is a defective return seal in the brake master cylinder. When the brakes are depressed fluid is pushed into the wheel cylinders, activating the brake pads and shoes. After a few operations of the braking system the fluid fails to return to the master cylinder and with each further action the brakes become tighter. After the vehicle stands for some time the pressure gradually releases and frees the brakes. Have the brake master cylinder checked. It's good policy to replace the brake fluid once or twice a year as part of the major service. Regards John

Nov 28, 2013 | Cars & Trucks

1 Answer

Power brake booster


get a new one but perhaps this is not the problem brake boosters seldom go bad. press on brake pedal a couple times until firm. then start engine while holding brake pedal the pedal should move down towards floor upon start up. if this is not true then check to see if the air line from the manifold to brake booster is in good non cracked and make sure you are getting good manifold pressure as well. repair hose or manifold if your not getting good pressure then check booster again as described above

Apr 22, 2013 | Nissan Pickup Cars & Trucks

1 Answer

1995 GMC sierra vacuum leak when brake pedal is pushed


you mean you hear it WHEN you push pedal ? power booster could be going bad ! check allvacuum lines, sound good ? any trouble with brakes ? hard pedal ? tighten throttlebody mounting bolts ! gaskets do go bad, they get hard, dryout, become brittle, vacuum leak !!! replace vacuum lines if cracked, dryed out, etc.,, you can use a 3 to 4'-0 pc. of hose to listen hissing sounds where vacuum occurs to locate the leak .

Mar 24, 2013 | GMC Sierra 1500 Cars & Trucks

1 Answer

Brake pedal gets hard when braking, no normal braking


If there is a malfunction in the brake servo assist system, and your assistance is reduced, the brake pedal will become hard and you will need much more pressure on the brake pedal to stop the car.

It is possible that there is a vacuum leak in the brake servo assist system and you are only getting 50% or less assistance when you are applying the brakes.

You need to have the vehicle checked out without delay because if you lose brake assistance entirely it will be very difficult to stop the car.

Dec 22, 2010 | 2007 Toyota Camry

2 Answers

1995 montero brake light stays on.new brakes supposedl.and there is a 3 position setting m-h-p on dash is that traction control and what does it mean?thanks


the switch down by the pedal is out of place
not sure what the m-h-p is, either different levels of traction control or more likely suspension hardness

Jan 14, 2010 | 1995 Mitsubishi Montero

1 Answer

Loss of brake pedal pressure, hissing sound when pedal is pushed, no visible fluid leak


if the pedal is hard to push like a manual brakes on an old truck I would say the power brake booster is going out

Aug 05, 2009 | 2004 Ford Super Duty F 550

1 Answer

2003 honda accord alarm problem


Check Brake pedal sensor (contact behind pedal), this part tends to break on alot of Hondas it will apear broken most likely. If that's not the issue you could try to check or pull fuses that are associated with the alarm (check owners manual).To overide the shifter there is a small tab next to the shifter itself pop this up with a screwdriver and then depress the tab underneath, while depressing the tab shift the vehicle out of gear. You may ask why the brake pedal sensor? When you change your car into gear from park you have to depress the brake pedal, when you depress the brake pedal the sensor becomed engaged and sends a signal to the cpu which sends a signal to a sensor by your shifter and unlocks it. If the brake pedal sensor is broken or faulty it will not engage properly and there will be no signal sent.

Jul 05, 2009 | 2004 Honda Accord

2 Answers

1996 HONDA ACCORD FRONT BRAKE LOCK UP AFTER


check that the master cylinder is not locking on with a pressure build up the cyl may need replacing probly does

May 11, 2009 | 1996 Honda Accord

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