Question about 1996 Oldsmobile Bravada

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Brake on 1996 bravado hard to press and wont stop car tried replacing caliper booster wheel cylinder still the same resort

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Check vacuum at the power brake booster -also test booster internal diaphragm may be damaged -if both good check and test abs module

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Changed front and rear pads front calipers and master cylinder bled lines brakes hard but wont immediately stop kinda stuck on whats next rotors good

check the brake booster if the pedal is really hard and no feel to the brakes check the hose to the booster from the engine try pumping the brakes does this effect the idle of the engine?? it shouldn't

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87 toyota clutch wont engage after brakes were replaced

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Nov 14, 2012 | Toyota Cars & Trucks

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Brake pedal hard as a rock wont slow/stop at all. driving along suddenly no brakes

Hi sdixon!

Please read this all the way through so you get the full picture, because the last sentence is VERY important to troubleshoot your problem correctly!

The problem is usually associated with the master cylinder. The first thing to check is the vacuum booster unit- make sure it is getting vacuum and that the hose that leads to it from the engine has not come off or was torn. When you disconnect the hose from the booster unit, there should be allot of suction on the end of it. If not, find and fix the vacuum leak.

**Note- The following is much easier and safer if you can get your Jeep up on a lift so all 4 wheels are in the air. If you have a friend or family member that has access to a lift, ask them for help!

A frozen master cylinder piston will also cause your problem, but to be certain you need to eliminate each of the wheel cylinders/calipers first. You will need one other person to help check this... Jack up one wheel at a time. Make sure each wheel can spin freely (you will have to put your Jeep in neutral, so block the wheels so it ca'nt roll) Note if any wheel seems to be dragging. When the brakes are applied, you should not be able to spin the wheel at all (put allot of effort into it to make sure). A dragging wheel, and/or one that you can turn with the brakes being pressed indicates a frozen wheel cylinder piston or caliper piston (you did not specify the year of your Jeep, so I mention both to cover the rear drum brakes in older Jeeps. Example: My 2001 Grand Cherokee is rear disc, so it has calipers).
If all 4 wheels behave the same (the perfect example is that even with the brake pedal pressed down you were able to still turn each one of them) the master cylinder is bad.
Good Luck, and Thank You for using FixYa!

Apr 15, 2011 | Jeep TJ Cars & Trucks

1 Answer

I have a 96 isuzu rodeo,3.2 and the brakes will lock up on their own, gradually then it takes about 15 minutes for them to release, any thoughts?

this could be caused by a few things, first you need to jack the truck up you will need all 4 wheels off the ground, put the transmission in neutral and have some one get in the truck and wile turning each wheel have the person in the truck push the brake pedal the wheel should stop instantly then have the person release the brake the brake should release instantly,( do this to each wheel ) if all brakes remain locked ( wont release instantly ) then replace the master cylinder if the both rear brakes wont release instantly replace the brake hose from the frame to the rear differential, if the both front brakes wont release replace master cylinder, if only one front brake wont release open the bleeder on that brake caliper if the wheel releases replace the caliper hose if the brake still wont release with the bleeder open replace the caliper, you should replace the caliper and brake hoses as a pair.

Mar 02, 2011 | 1996 Isuzu Rodeo

1 Answer

I put new brake booster an mastercylinder an still have no brakes i thought if i put these new items i would have brakes so what im asking is what elses could be wrong ? MY BRAKES JUST STOP WORKING SO I...

You did bleed out the master cylinder?? You need to check the system for leaks and make sure the front and rear brake pads/shoes are in good condition and that there is no air in any of the calipers or wheel cylinders and that when you press on the brake pedal that the fluid is actually getting to them.
(bleed those too)

Jan 27, 2011 | 1993 Jeep Cherokee Country

2 Answers

Brake pedal needs to be depressed very hard to stop,pedal is mushy,pads and shoes have been replaced, rear wheel cylinders have been replaced.calipers have been replaced, front brake lines have been...

The pedal goes down a long way(Rear brake shoes out of adjustment) or the pedal is hard to push and you have to about use two feet to stop the truck? (booster problem)

Jul 18, 2010 | 1996 Chevrolet Suburban

2 Answers

I have to press very hard on my brakes to get it to stop. Do you know what it could be?

You should get the brakes fixed immediately as you have a potentially unsafe situation.

Check for leak of brake fluid if the reservoir is showing low level - this should be under the bonnet.

The brake pedal may need readjustment or brake pads may be running thin.

If all this is OK then brake master cylinder will need to be checked out.

Hope this is helpful. Please rate the solution.

Jun 16, 2010 | 1999 Chevrolet Tahoe

2 Answers


A bad brake booster will result in a hard brake pedal, stiff and more effort required to stop the truck. Here are my questions to you, first, you said you replaced the master cylinder, did you bench bleed it before you installed it? If not, there IS still air in it, regardless of how much you bleed the brakes at the wheels. Second, when you bled the brakes, after changing the calipers and master cyl., did you also bleed the proportioning valve? Sometimes air can get trapped in the valve, and its almost impossible to get it out bleeding just the wheels. And lastly, when the brake light comes on, does the abs light also come on with it? Air can also get trapped in the abs control module too.

Aug 11, 2009 | Chevrolet Tahoe Cars & Trucks

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