I have changed the rear pads, new master cylinder and brake line back to the brake light actuator. The brake pedal will not pump up! I used a vacuum pump to pull the fluid out of the bleeder screw to the point of only getting fluid no air. Still will not pump up. I removed the supply line to the calipers and used a plug to check the master.it pumps to the point of pressure. I replaced the supply line and when pumping the pedal the brake pads do engage the rotor, and fluid will come out of the bleeder screw but still the pedal will not pump up to pressure? Can anyone help?
ITS VERY POSSIBLE THAT U DON'T HAVE THE PROPER LINKAGE ADJUSTMENT AT THE MASTER CYLINDER LINK. IT'LL SHOW PRESSURE IF U HAVE A DEAD LINE ON IT, IF ITS ATTACHED TO THE CALIPER IT WILL PUT FLUID INTO IT BUT NOT ENOUGH TO PUSH IT UP ENOUGH TO TIGHTEN UP THE BRAKE. THE FREEPLAY IS WHERE THE MASTER CHARGES TO PUT MORE FLUID TO THE BRAKE. U PUT A VACUUM ON THE CALIPER THAT WILL PULL FLUID FROM THE MASTER PISTON SEAL, BUT IT STILL WON'T ALLOW IT TO CHARGE MORE FLUID TO EXPAND THE BRAKE TO THE ROTOR. (IT HAS GOT TO BE SOMETHING SIMPLE, NOTHING ELSE MAKES ANY KIND OF SENSE). HOPE THIS HELPS. I'M NOT YELLING, I TYPE ONE HANDED DUE TO INJURY I CAN SEE CAPS BETTER THAN SMALL LETTERS. ;0)'
no you can leave the same exhaust on it. anyway the exhaust pipe hooks to the exhaust manifold, not the intake.
one variable here is the increased power or air through the engine. if you have a substantial increase in power through the engine, the exhaust may not be able to let it flow as well as desired. i really dont see that from a cai though, not unless it was a 60s car anyway.
first of all with a vacuum pump it doesnt matter if the bleeder is at the highest point or not. im gonna ask you a stupid question did you put the right kind of brake fluid in it? it takes dot 5. if you put dot 3 or 4 in it it will do what you are saying. make sure you dont have a tiny leak and any of you connections
Everyonelse's answers pretty much cover all the possibilities. The major concern is making sure you used DOT5if you used DOT 3 or 4you RUINED the entire brake system and ALL rubber components MUST be replaced!!!!! The only other thing I can think ofis the caliper stock? If you have an aftermarket 2 or 4 piston caliper, your symptoms can be caused by the caliper pistons binding.this happened to the late model Indians and American Ironhorseson one side, the pistons were pusing out on the rotor, and the other side would not pump up, but instead, the pressure from the pumped side was pushing them back into the caliper. Clean off EVERY joint in the system with BRAKE CLEANER, hold down on the brake pedal for a couple minutes and look for any signs of leaking at every joint. This along with everone else's suggestions is all I can think off. Good Luck.
