Ok here is a puzzle to run through everyone's brain.
Yesterday I checked the front right brake pads because of some noise, other than it being a little low there didn't seem to be anything wrong. I pushed the piston back into place with a big C-clamp, encountering some resistance as I did this. I pushed it back in and put everything back together. I started the car and pumped the brakes and after a few pumps there seemed to be almost no brake pressure. When I checked the fluid level I left the cap off the resevour and went I pressed the brake pedal in and splashed fluid around.
Today I bought new brake fluid, filled the resevour back up, and still little pressure. Then I proceeded to bleed the brakes(according to the hayes repair manuel) , starting with right rear, the left rear, then right front. I then checked to see if I had any pressure back but there was very little. When I bled each wheel the piston push out like it should have.
I can't understand why I have little pressure when it was all working fine 2 days ago. When I backed the car up and down the drive way the car did stop but the pedal was all the way to the floor. I need some help guys?
1991 RS V8 TBI
Yesterday I checked the front right brake pads because of some noise, other than it being a little low there didn't seem to be anything wrong. I pushed the piston back into place with a big C-clamp, encountering some resistance as I did this. I pushed it back in and put everything back together. I started the car and pumped the brakes and after a few pumps there seemed to be almost no brake pressure. When I checked the fluid level I left the cap off the resevour and went I pressed the brake pedal in and splashed fluid around.
Today I bought new brake fluid, filled the resevour back up, and still little pressure. Then I proceeded to bleed the brakes(according to the hayes repair manuel) , starting with right rear, the left rear, then right front. I then checked to see if I had any pressure back but there was very little. When I bled each wheel the piston push out like it should have.
I can't understand why I have little pressure when it was all working fine 2 days ago. When I backed the car up and down the drive way the car did stop but the pedal was all the way to the floor. I need some help guys?
1991 RS V8 TBI
Supreme Member
If the master cyl ran dry, then it has air in it. Unfortunately because of the angle it sits at in these cars, the fitting for the line isn't at the highest point; so once air gets in there, you will never, ever, be able to get it back out as long as the MC is bolted to the car. A little pocket will always hide in teh highest point in the cyl.
You're going to have to "bench bleed" the MC.
You're going to have to "bench bleed" the MC.