kkopecki

I have a 96 mustang v6 and the rear brakes dont work. When i push the brake pedal down it goes very far down. To be percise, the top of the brake pedal rubber pad is 2 1/2" away from the floor. Would that mean that the master cylinder is bad. Also it might have air in it. How would i know if it has air in it? I am not sure about this but i think i remember somebody telling me that if you have the cap off of the resovior and you push the brake pedal down and the brake fluid squirts out of the top, you have air in it. Is that true? I will check if it does this on sunday.

Also the brake pads are new and the calipers pistons work and the calipers slide in and out. Brake fluid does come out of the bleader screw.
What else can i check to diagnose the problem.

When i have the rear tires off the ground and put it in drive and then let the tires turn and then step on the brakes it does slow the tires down but they will not lock up at all.

Thanks in advance!

bowsaw

Probably air, its a long way from the master to the rear caliper, i would spend at least 10 minutes bleeding, with a hose connected to the bleed nipple( mmm nipple), to see if there is air in there. The fluid should spurt up when the cover is off, means your piston is sealing and working properly. The master cyl has 2 brake circuits, one for front and one for rear. If its not leaking, is the paint on the booster rooted?, it should be fine.

kkopecki

What do you mean rooted? I do not know what that means.

On sunday i will bleed it more.

bowsaw

LoL, Sorry , are you in America?, if so rooted means buggered, stuffed etc.