Front Brakes Lock Up after a few stops - ZR-1 Net Registry Forums

johntorg · 12-10-2017

My front brakes lock up after a few stops. This is so bad that the car comes to a complete stop and can't be driven. If a wait a few hours the brakes release by themselves.

I have replaced both front brake lines but the problem still remains. If I crack either front bleeder screw both sides release. This would seem to indicate a problem with the master cylinder or the ABS unit.

The car is a 94 with 18k miles. The problem occurred when the car sat in storage for about a year.

My current theory is that if I crack one of the lines at the master cylinder and the brakes release, then it is probably the master cylinder causing the problem. If they don't release, then its probably the ABS unit.

I would appreciate it if someone could let me know if this approach makes sense and any other likely causes.

Also if anyone has a diagram of the brake line routing from the Master cylinder down to the ASR and ABS unit the brake calipers, it would be useful.

12-10-2017	#1
johntorg Join Date: Apr 2007 Location: Beaufort, SC Posts: 7	Front Brakes Lock Up after a few stops My front brakes lock up after a few stops. This is so bad that the car comes to a complete stop and can't be driven. If a wait a few hours the brakes release by themselves. I have replaced both front brake lines but the problem still remains. If I crack either front bleeder screw both sides release. This would seem to indicate a problem with the master cylinder or the ABS unit. The car is a 94 with 18k miles. The problem occurred when the car sat in storage for about a year. My current theory is that if I crack one of the lines at the master cylinder and the brakes release, then it is probably the master cylinder causing the problem. If they don't release, then its probably the ABS unit. I would appreciate it if someone could let me know if this approach makes sense and any other likely causes. Also if anyone has a diagram of the brake line routing from the Master cylinder down to the ASR and ABS unit the brake calipers, it would be useful.