Replace the master cylinder, bench bleed it, then throw your scan tool on and do an ABS motor he-home. Now bleed the ABS unit, do the rear bleeder first, then the front. Then you can bleed the rest of the system.
In your case the problem may simply be air in the ABS unit, it loves to hold air.
Use the scan tool to cycle the ABS motors two to three times each, then cycle the solenoids five to ten times. Now re-bleed the system.
If you do not have those functions or the scan tool, an alternate method it to just start the engine, let it run ten to fifteen seconds. Repeat this four to five times. This runs the ABS through a system test each time and will usually get any air out.
A quick way to tell if the air is in the ABS unit or the regular brakes is to pull the wiring connections off the ABS unit and step on the brakes. If they are still low, the issue is in the conventional brakes as that disables the ABS (it will trigger the ABS light and set a code as well but it is an easy test)
As for replacing all the parts be advised that can really bite you if the vehicle is involved in an accident.
Sunday, February 26th, 2017 AT 4:53 AM