98 Dakota. Brake pedal goes to floor. Replaced
master cylinder, frt and rear brakes. System has
been bled multiple times, cycled abs as well. Rears
adjusted properly. Pedal still falls to floor 1st
application after pumping pedal will stay at normal
height. Any suggestions?
sounds like you have a lot of air yet. let it gravity bleed for awhile.
System has been bled multiple times both gravity and pumping. This has been going on for about two months. Both calipers and wheel cylinders are working fine as well.
Did you bench bleed the master cylinder right ??? Are all the brake lines good ??? All your fittings tight ??? You still have AIR in the system Try Power bleeding it
System has been bled there is no air in it. Everything is tight no leaks line are good
Evidently you know it all !!!!!!!!!!!!!
smart ass ppl don't help here! My suggestion is to replace your ABS unit! a common problem with your descriptions
That happened to me,but I had a leak from my drum brakes!which are a headache to take apart
I'll assume that the brake system appears to have been serviced so there's no leaks or air in the lines, the master cylinder is good, and that all the brake parts on all 4 wheels are fine. And maybe there's no BS light on.First, remove the hose from the brake booster behind the master cylinder, right after running the engine a few minutes. You should hear it hissing when you pull the grommet fitting off. If not, check for vacuum leaks. But that's hardly ever the cause. So, next, try removing the fitting that routes fluid from the brake reservoir to the ABS pump module, and bypassing the pump so that instead the fluid is routed as in the normal, non-ABS way. Check the wiring & terminals & the fuse/relay for the module, and see that all the fluid fittings are secure. Meanwhile, with the pump bypassed, if it's faulty your brakes should now pump up at the pedal & feel solid. That's when it's probably time to replace that ABS pump.