Just replaced ALL brake lines on 97 exped. and had NO pressure when truck was running. Would build up with truck off but wouldn't hold. All brakes were bled many times. Now I've replaced the M/C, did a bench bleed and bled all wheels still the same any Ideas?

 

maybe you have a bad master cylinder or there's something on your ford truck parts like wheel cylinders that have a leak... just try to check all the parts or consult your expert car technician..

 

being as there are "no" wheel cylinders on a 4 wheel disk brake system kinda hard to do. for those of you that might have this problem in the future this is what the final solution was. There "was" air in the abs block and w/o the proper scanner that does an abs recycle forget it. What I ended up doing was a Centrifugal bleed by letting the weight of the fluid move the air out of the abs by hooking a hose to open bleeder, into a bottle (to catch fluid) and keeping master full at all times one wheel at a time. takes a few hours per wheel but took care of the problem. By doing it slow the fluid brought air out with it and no need for a computer