1990 mustang gt no brakes!

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ddt4436

New Member

Feb 17, 2009

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Aug 21, 2009

#1

• Aug 21, 2009

• #1

I have a 1990 mustang gt with basic bolt ons. There is no brakes at all! I checked and the fluid is full and there is some pressure but I can here air being sucked from under the steering column by the brake pedal. When I take the vaccum line lose at the Booster/Master cylinder the hissing stops. Do I have a vaccum issue or is my brake booster/ master cylinder bad?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,260

17,944

224

Massachusetts

Aug 21, 2009

#2

• Aug 21, 2009

• #2

Sounds like your brake booster is faulty

 

D

ddt4436

New Member

Feb 17, 2009

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Aug 21, 2009

#3

• Aug 21, 2009

• #3

Are they hard to replace?

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,260

17,944

224

Massachusetts

Aug 21, 2009

#4

• Aug 21, 2009

• #4

Yes and no. Getting under the dash to take off and put the 4 nuts on is a little PITA, but once it's free and you unbolt the MC it comes right out.

Try this test first. With the car off, pump the pedal. It should get hard as a rock. With your foot pushing on the pedal, start the car. The pedal should sink.

 

D

ddt4436

New Member

Feb 17, 2009

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Aug 21, 2009

#5

• Aug 21, 2009

• #5

What outcome do I need to be looking for? Im fairly new to the Brake Booster/ Master Cylinder era. lol Thanks for helping