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Have 1991 ford taraus power brakes are hard to push in ; no brakes whats my problem? how do I test power brake booster ?

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Not alot of actual tests but first is the hose that goes to it connected and does it have strong vacuum when vehicle is running? Next get under dash by pedals push brake pedal, can you hear air leaking? Tests are inconclusive probably needs booster either way.

Posted on Apr 06, 2015

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Good morning, I have tried for 2 days now to speak to somebody in your technical department about my bantam bukie


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Power Brake Booster Test

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When push brakes you have to push really hard to make them go in then the truck barely stops. Replaced the MC and bled the brakes now every time push brakes truck acts like its going to die. Brake light...


Sounds like you will have to bleed your brakes again, but thats not the problem og hard brake peddle, need to check your power brake booster, sit right in back of master cylinder, check make sure it has vacum going to it, also to test it with engine off, press on brake peddle three time, then state engine with foot on peddle, peddle should go down a few inches, also with engine of peddle should feel soft for three pumps, if you have none of this , power brake booster is bad.

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Having trouble with the brakes on my '90 Ford ranger. Replaced the master cylinder and still have very little braking power. Any help would be appreciated!


***Seek out professional help this vehicle is not safe to operate.***


Check the vacuum line going to the brake booster.

This is the big round chamber behind the master cylinder.

Hope this tip helps.

R/
David

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1 Answer

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Chk. for vacume to booster, or loss of vacume like a break in vacume hose, do you hear a hissing noise when you step on break peddel. If you don't hear anything chanses are its the booster. When peddel gets hard to push you either lost vacume or booster went bad.

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I would think the power brake booster has failed, do u hear any hissing when u press the brake pedal?

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