I have been troubleshooting my brake system over the last few days. I have done almost all the "usual" things that people suggest for correcting spongy/long traveling brake pedals. I'm now down to testing the RABS valve (Rear ABS) or rear anti-lock dump valve, as some folks call it. Does anyone know what size of fittings are used on this valve? I need to know so I can get the correct inverted brake fitting caps to plug it off and isolate the brake system. This is part of troubleshooting/process of elimination for me and determining if indeed the anti-lock valve is causing my pedal issues.

 

x2, I'm having the sameproblem. All new brake shoes, calipers and wheel cyl.
The brakes still suck and the ABS light stays on. What's up?

 

Have You Checked Your Vacum Pumps To Make Sure They Are Both Pulling? That Was One Of The Issues I Had With Mine. I Also Tossed My Abs Unit Which Did Help Also. Still Didn't Give Me The Best Peddle I Could Have. Converted To Disc Brakes In The Rear, And The Thing Will Put Me Through The Windshield Now By Just Touching The Peddle. I Know This Isn't Exactly What You Were Looking For, Just Thought It Might Keep You From Waisting Some Time.