Rear brakes not working "abs and brake light are on" help
01-25-2015, 12:12 PM
#1
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Rear brakes not working "abs and brake light are on" help Ok I have seen this is an issue, now I get to try and deal with it. I have a 94 Formula the back brakes are getting now pressure cant even stop the wheels at idle while jacked off the ground. Both ABS and Brake lights are on, when I try to bleed the ABS module with the two bleeder valves the lights come on and off. I had a bad spot in the brake line where I patched it and I think air is in the system. Please help I'm at a lost I've tried bleeding the system about 4 times.
Thanks; Josh.
Thanks; Josh.
01-26-2015, 05:43 PM
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The area that was repaired is a few inches right under the drivers side where the lines make a bend, I used fuel line and hose clamps to fix the bad spot the rest of the line looks good. Im not leaking any fluid the fix is very tight. For what its worth Im very familiar with my way around a car especially and Fbody.
01-27-2015, 11:24 AM
#5
I'd expect that this is the problem and that fuel line would not be rated for the pressures that the brake system sees. That repair may be bulging as the system pressurizes. You could get the air out and bleed the system, since that is a low pressure exercise (when the bleeder is open) but the hose may be stretching when it see's real braking pressure.
From StopTech: "2) Brake line pressure: Brake line pressure is the hydraulic force that actuates the braking system when the pedal is pushed. Measured in English units as pounds per square inch (psi), it is the force applied to the brake pedal in pounds multiplied by the pedal ratio divided by the area of the master cylinder in square inches. For the same amount of force, the smaller the master cylinder, the greater the brake line pressure. Typical brake line pressures during a stop range from less than 800psi under "normal" conditions, to as much as 2000psi in a maximum effort."
From StopTech: "2) Brake line pressure: Brake line pressure is the hydraulic force that actuates the braking system when the pedal is pushed. Measured in English units as pounds per square inch (psi), it is the force applied to the brake pedal in pounds multiplied by the pedal ratio divided by the area of the master cylinder in square inches. For the same amount of force, the smaller the master cylinder, the greater the brake line pressure. Typical brake line pressures during a stop range from less than 800psi under "normal" conditions, to as much as 2000psi in a maximum effort."
02-01-2015, 09:23 AM
#6
try using a pressure line fitting to "patch" the broken line. I had a similar issue from a brake line rubbing on an axle and cut a hole into the line. Moved the line away from the moving axle, cut off jagged edge of brake like with tiny pipe cutter and put pressure line fitting in its place. No issues ever again.