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probably have a bad master cylinder.
no you dont have to---BUT its adviseable
If you didn't bench bleed the master you need to do that before you install the master.
The ECU for the ABS brakes is attached to the Master cylinder for the brakes.
master cylinder is sticking
How do I put on a 2001 ford explorer cylinder? I am in the process of changing my front brakes and the cylinders will not push back in?
. If you have the 4-port master cylinder, the bottom ports go to the rear brakes & the upper side ports go to the front brakes.
Take it to the mechanic and pay him.
The ECU for the ABS brakes is attached to the Master cylinder for the brakes.
Sounds as though you still have air in the cylinders at rear.
just the slave cylinder, for your brakes.
A brake master cylinder? If you are losing brakes or brake fluid.