brake pedal to the floor??? - Honda Civic Forum



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Old 06-12-2008   #1  
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brake pedal to the floor???

Hey everyone,

I noticed that when I have the AC on, my brake pedal goes to the floor, as if i am loosing brake oil or something. When I stop at a light, i feel I need to pump the pedal many times to get the car to stop.

the hand break is strong and the car brakes normal without the AC - WTF?

civic 96, si

thks for all your help in sheding some light on the issue -
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Old 06-12-2008   #2  
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Re: brake pedal to the floor???

I never heard of that before...
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Old 06-12-2008   #3  
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Re: brake pedal to the floor???

i even checked the brake fluid and it is maxed. i really can't understand.
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Old 06-12-2008   #4  
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Re: brake pedal to the floor???

i had a simmalar problem in my 4th gen. i ended up replacing the master cylender b/c it would leak and it would slowly sink to the floor w/o the a/c but with it would go down to the floor and just b4 it would hit it would stop the car.

replace the master cylender. worked for me
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Old 06-12-2008   #5  
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Re: brake pedal to the floor???

yeah at first i would say the master cylinder but it might also be something wrong with the power brake booster.
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Old 06-13-2008   #6  
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Re: brake pedal to the floor???

Whoa, I donno, but get it fixed fast, that's important!
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Old 06-13-2008   #7  
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Re: brake pedal to the floor???

I will have it checked next week and will keep you updated

thks for your help

GB
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Old 06-13-2008   #8  
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Re: brake pedal to the floor???

Brake booster... or simply a cracked vacume line. Considering it only happens when the AC is on.

Its probably a good time to replace all of your vacume lines any way.
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Old 06-13-2008   #9  
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Re: brake pedal to the floor???

+1 on the vac line. The brake booster works by making a vacuum between the pedal head and the master cylinder. Something is happening when the A/C is on to make the vacuum not work, probably a leaking hose somewhere. Get it fixed, I don't want my injury risk higher knowing that there are people knowingly driving on roads with bad brakes...
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7th, 95, 96, 98, ac, brake, brakes, break, civic, floor, gen, hit, pedal, poping, slow, sound, travels

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