Power brake booster
Thread Starter
Racer
Joined: Oct 2006
Posts: 354
Likes: 0
From: Stilwell OK.
Power brake booster
Question, my brake pedal will almost go to the stop at the bottom, I have changed the master cylinder, brake pads, no fluid loss any where I can find, fluid level is never low. I can't find a vacuum leak anywhere, do you think my problem is the brake booster? 
Burning Brakes
Joined: Nov 2006
Posts: 763
Likes: 2
From: Weston FL
Instructor
Joined: Jun 2006
Posts: 173
Likes: 0
From: Arkansas
Mine did, had to put all of me onto the brake pedal to stop it and it went to the floor like standing on concrete. Also, I'm no expert, however, my mechanic told me that when I stopped and the engine 'revved' just a tiny, tiny bit, that, along with the pedal issue, was a dead giveaway. Got mine replaced part and labor for around $250. Most places here don't charge just to look and see. Good luck.
Corvette Enthusiast
Joined: Oct 2007
Posts: 6,800
Likes: 2,724
From: So. Cal.
2025 C7 of the Year Finalist- Unmodified
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brake booster
If your braking system is working, but your power booster is not you will still have full pedal. Extreemly hard to stop car this way. Sounds like you have air in the system somewhere. Just my $.02
Good luck.
Good luck.
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Melting Slicks
Joined: Feb 2005
Posts: 2,057
Likes: 5
From: Bay Shore, NY
Try bleeding the brakes first and see what happens. Also, you mentioned you replaced the master cylinder, did you bench bleed that before you installed it?
Instructor
Joined: Mar 2008
Posts: 148
Likes: 0
From: Rindge NH
Just replaced my booster this past weekend. Pedal was very, very hard to press but it did not go anywhere near the floor. Almost felt quite the opposite - pedal goes down farther with a functioning booster. Doesn't sound like a booster to me....
Pro
Joined: Aug 2005
Posts: 630
Likes: 2
From: BEMIDJI MN
If I recall when my booster went bad I could hear the sound of air escaping whenever I depressed the brake pedal. I went with the steel replacement one rather than pay twice as much for the plastic one. As far as the installation went, it was not easy to move around down there but it only took a couple of hours to get it in. That has been over 3 years ago and it still works fine.
Le Mans Master
Joined: Dec 2005
Posts: 8,589
Likes: 976
From: Communist Colorado
My question is did it have the same symptom before you changed the M/C and pads? If you didnt, then you have air in the lines as many have said. The symtom of a bad booster is a rock hard pedal, not a pedal that goes to the floor. I think at this point swapping the booster is a waste of time.
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From: So. Cal.
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booster
Bill,
You are not fixing anything by changing your booster.
BTW, let us know how much it sucks to change it out.
I have changed many. But I would never change out a good one.
Evtreemly difficult to reach top bolts. Good Luck!
Corvette Mike
You are not fixing anything by changing your booster.
BTW, let us know how much it sucks to change it out. I have changed many. But I would never change out a good one.Evtreemly difficult to reach top bolts. Good Luck!
Corvette Mike