BRAKES

1992 Cadillac Deville

Tiny

sean03

June, 7, 2012 AT 6:00 PM

I replaced my 2 rear wheel cylinders and I replaced my left front caliper because the bleeder screw broke. I bleed the brakes and everything was nice and tight. Now when I start the car the pedal goes to the floor. I called advanced and autozone and they said I have air in the lines or I have a leak. I checked for leaks nothing. I called napa and he said it is either the master cylinder the brake booster or the abs pump. With the car off when I pump the brakes it goes to the floor and does not build up pressure. Any suggestions. Thanks.

9 Answers

Tiny

Docfixit

June, 7, 2012 AT 6:18 PM

If sure all air bleed out then seems master cylinder is faulty

Tiny

sean03

June, 7, 2012 AT 6:20 PM

That's what I thought how would I know if the booster is broke

Tiny

Docfixit

June, 7, 2012 AT 6:24 PM

Pedal would be VERY hard

Tiny

sean03

June, 7, 2012 AT 6:27 PM

Oh oksorry one more question. Could the brake booster check valve be bad. It has never been changed before. Thanks.

Tiny

Docfixit

June, 7, 2012 AT 6:29 PM

Then you would hear hissing and engine would die at idle

Tiny

sean03

June, 7, 2012 AT 6:31 PM

No it is the master cylinder then thanks for clarifying this up for me.

Tiny

Docfixit

June, 7, 2012 AT 6:35 PM

Try bleeding at master see if you get pedal and rear shose need to slightyl drag as drum is turned

Tiny

sean03

June, 7, 2012 AT 8:19 PM

I found out that the brake fluid cap the little rubber piece under the cap fell into it. I washed the inside of the master cylinder out. Is it still safe to use once the water dries up on the inside. Thanks

Tiny

Docfixit

June, 7, 2012 AT 8:26 PM

Tes dry it real good

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