I would suspect you have purchased a defective master cylinder, especially if it was a rebuilt unit. Also make sure you have bled the system properly & completely to remove all air. Bleed in this order. RR-LR-RF-LF The master cylinder must be bench bled prior to installing ; I suspect you have air in the system if you did not bench bleed the master cylinder prior to installing it on your vehicle.Try this: obtain a quart of brake fluid and rebleed the system; you want it to be this problem vs removing parts and starting over. I hope this helps you. Mark
You have drum brakes on the rear.
When you stomp on the brakes and you still hit whatever is in fron of you... of course!
It is an ABS module for the rear brakes...
bad mastercylinder.
( 1 ) on each of the rear drum brakes
mine only has rear anti lock brakes!
The calipers or wheel cylinders are bad.
There is brake hardware and lubrication that needs to be replaced. The brake hardware and lubrication that goes on the hardware allows for the brakes to easily release. Now you may want to check to see if your calipers are sticking, or even check to see if the wheel cylinders for your rear brakes are frozen. I am a Brakes Plus Employee.
you could have a few problems such as air in lines or a bad booster i would bleed the brakes and see if that helps if not check your booster and vacume
In the common workshop manual by Haynes.
Check the proportionating valve.
Replace wheel cylinders