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The brakes on my 1995 disco 1 300tdi are hard and do not stop the vehicle , the vacuum pump works and I re placed the booster with a new booster. STILL the some ;I Think it the master cylinder is the

Pump the brake pedal and you have no brakes

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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dennymulford
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SOURCE: brake pedal goes soft when engin is running on 1998 chevy 1500

pull your rear drums and inspect the shoes,you may have too addjust them out by hand too get the peddle you want

Posted on Mar 15, 2009

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SOURCE: 1998 chevy s10- brake pedal goes to the floor-

Did you put fresh fluid in the master cylinder? I really think you still have air in the lines. To bleed manually, start with the bleeder the greatest distance from the master cylinder, car running, helper pushing down about half way on brake pedal and releasing 3 times, on 3rd time, holding pedal down to half way depressed point while you open the bleeder valve. Repeat until you are sure all air has been flushed out. Check master cyl reservoir level often, because if it gets low and you **** air into the system, you have to start all over again. Go to wheel next greatest distance from master cyl, repeat above, working your way to wheel closest to master cyl last.

Posted on Apr 12, 2009

  • 4 Answers

SOURCE: 1993 f250 7.3 diesel - hard pedal, hard to stop,

Change the master cylinder on your booster. had the same problem with early 90's ford ranger. The pistons inside the master cylinder are probably worn...... Make sure to bench bleed the new master cylinder....

Posted on May 19, 2009

  • 1118 Answers

SOURCE: brake pedal hard to push, like the power is gone.

Could be booster, chk. vacume from engine to booster, usely when that happends you have lost vacume to the booster, very seldom does the booster go out, I'am not saying they don't, its just seldom they do. Do you hear a hissing sound either from under the hood or under the dash above break peddel? If you do you got a major vacume leak,if you hear it comming from under the dash its the booster, if you just hear it under the hood its in the vacume line from engine to booster.

Posted on Aug 09, 2009

  • 64 Answers

SOURCE: Fiat Uno Pacer - Brake Booster not assist braking

it could be that the master cylinder is bad or the brake booster is bad also check the vacum hose going to the brake booster if it has a hole in it it will lose pressure and make the engine lose rpms

Posted on Aug 23, 2009

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2 Answers

How do i test my brake booster


IF THE BRAKE BOOSTER IS NOT WORKING THE PEDAL WILL BE HARD ALL THE TIME AND WILL BE HARD TO STOP THE VEHICLE. FIRST TO TEST YOU CAN PULL THE VACCUUM HOSE OFF AND LISTEN FOR A IDLE CHANGE IN THE ENGINE. THEN NEXT YOU CAN ( WITHOUT ) THE CAR RUNNING, PUMP YOUR BRAKE PEDAL UP TILL HARD THEN START THE CAR, THE BRAKE PEDAL SHOULD GO DOWN A BIT. HOPE THIS HELPS..

Aug 24, 2014 | Cars & Trucks

2 Answers

How do you know that a brake booster is bad?


Booster problems are rare but they do go bad sometimes.
A bad booster generally causes the brake pedal to feel hard to push down, and a lot of pressure on the brake pedal is required to make the car stop.
Rarely, a vacuum brake booster will develop a vacuum leak, which can cause engine performance problems, hissing or whistling noise, as well as requiring increased pressure on the brake pedal to stop.

The first test:
With the vehicle parked, turned OFF, and the parking brake set, pump the brake pedal 5 to 6 times. If the pedal gets harder to push after several times, your booster is probably good.

The second test (To make sure):
After the test above, without making any changes, press and hold the brake pedal with light to moderate pressure.
Now with your foot still on the brake pedal, start the vehicle.
If the booster is good, you will feel the pedal go down when the engine starts.

Hope this helps!

Jun 21, 2014 | 1993 Cadillac DeVille

1 Answer

Can i still have power brakes without abs assist?


on that year vehicle or any vehicle for that matter . ABS has nothing to do with power brakes . Behind the master cylinder is the power brake booster , vacuum controlled . ABS is a system all to it's own . Think you may have thing's mixed up . You may have a vacuum leak or the brake booster is bad . Is the ABS light lit on the instrument cluster .

Jan 07, 2018 | 1992 Dodge Grand Caravan

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

Isuzu trooper diesel piping diagram


when your brakes get hard 99 % of the time it is the brake booster if they get soft or spongy it the master cylinder

Aug 15, 2013 | Cars & Trucks

2 Answers

Hard brake pedal


You can only have whatever the engine vacuum is
at any time.
Is there vacuum to the booster check valve
& is the valve working,assuming you have the
old one or a new one with the new booster.
Does fluid flow out all 4 corners?
Are the Rubber Flex Hoses Collaped
Calipers Rusted & frozen?
Did you remove the master & clean out
the moisture from around the piston
That is where you start,then flush & on to
every component in the system, if they are
on the vehicle for many years
You do realize brake fluid gets changed every
2 years on all vehicles or you got big problems with
moisture in years to come

Jul 18, 2013 | Cars & Trucks

1 Answer

I have a 1995 K1500. I have had every part of the brake system replaced and still no brakes. when I stump on them it feels like your pushing on a brick wall, then they leak down to almost the floor be


That hard pedal is a sign of a vacuum leak on the brake booster.Check the vacuum hose on the booster for holes and with the engine running have someone push the brake pedal while someone else watches the hose to see if it is collapsing when the brake is applied.If it does that will be your problem.Replace the 3/8 vacuum booster hose.It will have to be the thick hose just for a vacuum booster or it will do the same thing if that is what is wrong.

Jan 21, 2012 | 1995 Chevrolet K1500

1 Answer

Have to press hard on breaks to break on 528i bmw 2000


sounds like brake booster not working
check vacuum hose that goes to booster is ok and not leaking
engine off
pump up brake pedal several times
hold brake pedal down
start engine
pedal should sink down approx half to 3/4 way down indicating booster is working
if pedal doesnt go down when engine is running booster has leak or no vacuum supply from engine which requires great pedal effort to try and get vehicle to stop.

Jun 26, 2009 | 2000 BMW 5 Series

1 Answer

Brakes aren't working. put in 3 cans of brake fluid, can't find leak but fluid disappears. what next?


Try pumping pedal with booster vacuum line disconnected at booster,
check if any fluid at vacuum connection.
Do this with engine not running.
Please let me know if pedal goes hard and fluid at vacuum port
, if so booster is faulty

Aug 01, 2008 | 1995 Jeep Wrangler

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