power booster not working. Help?
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power booster not working. Help?
I was having problems with the brake pedal getting hard and losing braking power and the brake light on the dash coming on, particularly in reverse. Midas played with the rear brakes, and it got worse. They said it was the vacuum booster. I replaced it (and the master cylinder), and it's still not working right. It takes time to build the power, and then it loses it, and the dash brake light comes on and the pedal gets very hard. I pulled the vacuum hose with the check valve, and can feel the vacuum puffing. I bled the master cylinder. Any suggestions anyone?
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Originally Posted by RXRR
I was having problems with the brake pedal getting hard and losing braking power and the brake light on the dash coming on, particularly in reverse. Midas played with the rear brakes, and it got worse. They said it was the vacuum booster. I replaced it (and the master cylinder), and it's still not working right. It takes time to build the power, and then it loses it, and the dash brake light comes on and the pedal gets very hard. I pulled the vacuum hose with the check valve, and can feel the vacuum puffing. I bled the master cylinder. Any suggestions anyone?
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Where's the vacuum pump and how do I check it. The hose to the booster comes from a little can. everything from the can to the booster seems ok. It's a 96 f250 hd 7.3 psd. the midas guy says its a vacuum booster not a power booster. what and where is the tank you suggest checking?
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Joined: Apr 2004
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From: Silver Lake Dunes, MI
your vacum pump is right below the a/c compressor with about a 3/8ths rubber hose coming off it. you need to use a vacum gauge to check because using your finger is not accurate enough. the brake light comes on because it senses low vacum. the rubber hose goes to a vacum manifold where it splits to a number of other accesories. the manifold is on the drivers side fender well. the vacum should be between 17-21 in. hg.
hope that helps
tim
hope that helps
tim
