Question about 1994 Honda Accord

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How can i know when brake booster is not working

The brake booster no work because

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In most cases if the power brake booster is bad, The brake pedal is very hard to push down. You may know it is starting to go bad if you hear a hissing/sucking noise when pushing the brake pedal. Hope this helps

Posted on Jan 09, 2013


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Posted on Jan 02, 2017


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3 Answers

Can I use a 97 GMC Jimmy brake booster to replace a 98 GMC Jimmy brake booster? I'm buying a vehicle and need this part but found a 97 way cheaper than the 98 and they look the same! TIA

I don't if that differs between manufacturers? I looked at for your brake booster, cardone part for your vehicle lists 97--2005 for your vehicle, brake booster.
If all the hook-ups are the same as the one your looking at, I don't know why it wouldn't work?
You know how it is, I see nothing from here.

Oct 09, 2016 | GMC Cars & Trucks

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1991 Nissan Pintara U12 brakes don't work

check it actually has vacum at booster,if it has check seals installed behind master cyl and ahead of brake pedal.
if above checks out and theres no hissing when you step on pedal someone screwed up booster rebuild

Oct 31, 2017 | 1991 Nissan Stanza

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How to repair a brake booster for a 1992 Chevrolet Cavalier

Click here Jeremy to see how to replace brake booster.

Dec 10, 2012 | 1992 Chevrolet Cavalier

1 Answer

Brake booster is not working

If you have not checked the large vacuum hose that runs from the intake manifold to the brake booster, or the one way check-valve the hose connects into the booster with, please do so before rearranging your budget. If the hose or valve are dry rotted, cracked or not sealing tight at the ends, replace them and see what the booster does.
Also, the booster will usually make a continuous hissing sound if its bad.
It may be the master cylinder is bad.

As a rule, if the brake pedal goes to the floor with little or no effort, it's the master cylinder.
If you have to stand with both feet on the brake pedal, gripping the steering wheel to stop, its the brake booster 90% of the time. The other 10% is the master cylinder.

Hope this is clear as mud! and helps... let me know.

Aug 30, 2011 | 1999 GMC Yukon Denali

1 Answer

How to test my brake booster to find out if it is working properly or not. Thanks

Find a way to pressurize the booster. At the suction port of the booster you would have to fabricate a tire valve and maybe install an air gauge to see if air is leaking out. Remember there is a rubber bladder inside the booster.
If air is leaking around the rubber diaphram then the brake booster will not work. Did you check the hose and valve going to the brake booster? If you have a vacuum leak, then the booster will not work.
Was your master cylinder leaking inside the brake booster? When brake fluid leaks inside the booster the brake fluid will destroy the rubber diaphram. hope help.

Jun 20, 2011 | Mercedes-Benz 560-Series 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

Will a repair manual explain to me how to fix a brake booster?

Yes , for sure. A haynes manual is a must have for anyone who wants to do work on their own car. It will save you hours of frustration and unnecessary work. WELL worth the cost.
When you say the booster is going out , are you sure ?
They work of a vacumme hose from the engine , if that hose is leaking , or the little valve where it goes into the booster is no good , than you might think the booster is bad when it is good.
In general terms either the booster is good , or it is bad and you have to stand on the pedal to get any brakes.
If you post more info about what your brakes are doing , or not doing , someone might give you a different solution / diagnosis.

Jun 02, 2010 | 1997 GMC Yukon

1 Answer

Any info on changing a brake booster on a 1996 Sierra and also help trouble shooting a master cy. Thanxlinder

a defective master has just one common symptom, a soft sinking pedal.
Instructions Things You'll Need:
  • Nose pliers
  • Ratchet and socket
  • Ratchet extension
  • Slip joint pliers
  • Wrench
  • New cotter pin
    Removing the Old Brake Booster
  1. Step 1 Park your car in a safe place with enough room to work around the front and driver side of the vehicle.
  2. Step 2 Locate the booster push rod connected to the brake pedal.
  3. Step 3 Remove the cotter pin securing the booster push rod pin to the brake pedal using a pair of nose pliers.
  4. Step 4 Release the push rod pin from the brake pedal and slide the push rod off the brake pedal.
  5. Step 5 Unscrew the four mounting nuts off the brake booster studs using a ratchet, ratchet extension and socket. You should be able to see the four booster studs extending through the firewall, in front of the brake pedal.
  6. Step 6 Disconnect the vacuum hose from the brake booster, working from the engine compartment. Use a pair of slip joint pliers.
  7. Step 7 Remove the two nuts holding the brake master cylinder to the brake booster. Use a wrench or ratchet and socket.
  8. Step 8 Separate the brake master cylinder from the booster just enough to make room for booster removal.
  9. Step 9 Pull the brake booster off the firewall and remove it from the vehicle.
    Installing the New Brake Booster
  10. Step 1 Set the new booster in place by sliding the push rod and four mounting studs through the mounting holes on the firewall.
  11. Step 2 Slide the brake master cylinder flange over the two mounting studs on the brake booster.
  12. Step 3 Start the two brake master cylinder mounting nuts by hand to avoid damage to the threads.
  13. Step 4 Tighten the two brake master cylinder mounting nuts using a wrench or ratchet and socket.
  14. Step 5 Connect the vacuum hose to the brake booster.
  15. Step 6 Screw the four mounting nuts to the brake booster working from inside the vehicle. Start the nuts by hand to avoid damaging the threads.
  16. Step 7 Tighten the four mounting nuts using the ratchet, ratchet extension and socket.
  17. Step 8 Position the brake booster push rod over the brake pedal and slide the push rod pin.
  18. Step 9 Install a new cotter pin to secure the booster push rod to the brake pedal

Nov 20, 2009 | 1996 GMC Sierra

1 Answer

Brakes problem

jcakey: My name is Roger and I will answer your question for you. From what you describe the problem sounds like a bad vacum brake booster. A simple way to check is to do the following. With the engine off. Press on the brake pedal 4 or 5 times. This will deplete all vacum in the booster. Next start the engine while holding your foot on the brake pedal. The pedal should drop a couple of inches. If the pedal does not drop. The problem is the brake booster. When the booster is bad you will hear a hissing sound inside of the truck when you apply the brakes..
If the master cylinder is faulty you will wave mushy brake to no brakes.Your ABS and brake failure lights will be on. Should you need further help please just ask. I will be glad to help you. Please rate this answer as this is how we know your answer was useful.Thank You for using Fix Ya. Roger

Sep 09, 2009 | GMC Sierra 1500 Cars & Trucks

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