- Joined
- Aug 7, 2007
- Messages
- 508
- Reaction score
- 1
- Points
- 0
- Location
- California central coast
- Vehicle Year
- 1991
- Vehicle
- Ford
- Engine Size
- 4.0L
Block front wheels. Release parking brake and roll back onto blocks. Push driver's seat all the way forward. Install large 1/2 inch breaker bar between seat and brake pedal. Remove front driveshaft. Loosen output fitting from RABS valve and note if it leaks. If not, do the same to the input. Tighten both back up.If you don't mind my asking, how did you determine it to be bad?
A bad valve leaks at the input but not the output.
It's basically the same test I did on the master cylinder to determine it was good.
I also found a post in Ford Truck Enthusiasts that described the EXACT same problem, and the owner ended up disassembling the valve to find it rusted solid in the closed position.