So we got this Isuzu in our shop with a spongey pedal complaint. Another tech found rear cylinders leaking so he replaced them and went to do a normal bleed like any other and the pedal still spongey. I got brought into this job cause no one else can figure it out. I've used a vacuum bleeder and a pressure bleeder and of course the conventional method with pedal. I can't seem to get it bled out. From what I understand there are accumulators in abs unit that must be open to properly bleed . Is this true and if so how do I bet around that. I'm pulling my hair out trying to figure it out.????

George Cummings
Technician
Patriot Truck & Trailer
Texarkana, Arkansas, USA