Power Brake Problem!!!

J

johnsstang04

Member

Jun 26, 2005

80

0

7

Phoenix, Arizona

Aug 6, 2005

#1

• Aug 6, 2005

• #1

I feel like crying... the only thing that I never replaced on my car finally seems to be dying. I have a '69 with power front disc brakes and it isn't stopping very well. A few days ago I drove the car and the wire that holds the cap on the reservoir broke loose, thus I drove the car with the cap half off for about 10 min. Ever since then the car takes a ton of pressure on the pedal to stop. I think the cap slipping off could have caused the problem, but I don't drive the car much so any thing could have broke on it. I just finished bleeding the brakes and that did nothing.... could it be vacuum?

 

J

johnsstang04

Member

Jun 26, 2005

80

0

7

Phoenix, Arizona

Aug 6, 2005

#2

• Aug 6, 2005

• #2

I just wanted to mention that it doesn't feel like it has air in it... it feels very hard and not at all spongy. It just doesn't want to stop.

 

DarkoStoj

Founding Member

Sep 4, 2002

929

13

39

Detroit

Aug 6, 2005

#3

• Aug 6, 2005

• #3

sounds like the booster isn't getting any vacuum to me

 

C

C0V3R

Member

Feb 14, 2003

524

0

16

Australia

Aug 7, 2005

#4

• Aug 7, 2005

• #4

Or it has a hole in the diaphragm

 

J

johnsstang04

Member

Jun 26, 2005

80

0

7

Phoenix, Arizona

Aug 7, 2005

#5

• Aug 7, 2005

• #5

I'm going to test the vacuum sometime today, but I think it is the diaphragm. Where can i buy the diaphragm or do i need a whole new booster?

 

P

panteramatt

Member

Mar 5, 2004

31

0

6

Aug 7, 2005

#6

• Aug 7, 2005

• #6

Bleed the brakes. You might have gooten too much moisture in there.

 

WORTH

20+ Year Stangneter

Nov 18, 2002

2,166

44

98

Cape Cod, Ma.

Aug 7, 2005

#7

• Aug 7, 2005

• #7

having hte cap off the master shouldn't hurt anything if it didn't run out of fluid. If the pedal is hard and it doesn't stop it's more than likely a booster or vacuum problem, you'll need to buy the booster if that is the problem.

 

J

johnsstang04

Member

Jun 26, 2005

80

0

7

Phoenix, Arizona

Aug 7, 2005

#8

• Aug 7, 2005

• #8

I noticed there is sound coming from under the dash where the brake connects to the booster, and it sounds almost like a vacuum leak. I don't remember this being there before, so I'm guessing it's the diaphragm leaking. Also, who makes a booster for a '69 power disc brake (original kind)? I looked in NPD's catalogue and didn't see one. I though that there was a way to replace the diaphragm without putting a new booster on.

 

J

jbuening

Member

Apr 28, 2005

399

0

17

Aug 8, 2005

#9

• Aug 8, 2005

• #9

johnsstang04 said:

Also, who makes a booster for a '69 power disc brake (original kind)? I looked in NPD's catalogue and didn't see one. I though that there was a way to replace the diaphragm without putting a new booster on.

Click to expand...

Believe it or not, the local parts stores carry them and are MUCH cheaper than mustang parts suppliers. I bought my booster and M/C from autozone for around $130 for my 70. They were $240 at NPD.