1999 3.9 2WD

Brake pedal goes to floor...........

Replaced: master cylinder and booster check valve

I have bled master and front brakes....still pedal goes to floor but does stop wheels.

Help....been without my truck for a week now.

 

u generally bleed front and backs. specially when you replace a master cylinder.

 

bleed the master on the bench, then backs, then fronts. My pedal stops about the thickness of my left foot from the floor (IE, I can stomp my left toes by pushing the pedal with my right foot) and my truck stops on a dime, literally.

 

Busy day.......bled master cylinder on bench, bled backs to fronts....still no brakes!
Checked brake booster per dodge vacuum test....passed.

What in the world am I missing?

 

Have you pulled the drums off the rear to be sure the brakes are working as they should? I've seen stuff like wheel cylinder pushrods that weren't seated in the shoes.

No matter how well the hydraulic part of your brakes work, they won't do much if the mechanical parts aren't right.

 

You Shure you have the correct master there are 4 or 5 for the second gen depending on 4W or 2W ABS and each engine size according to different brake sizes also.

But I think you have something other going on

Did you get fluid out of the back brakes when bleed?

 

I adjusted the back brakes...they were loose. Spun rear wheel after it brakes stopped rear wheels. The master cylinder is correct - they gave me the incorrect one the first time!
I did get fluid out of the back breaks when bled also.

 

Can you provide more detail on the problem?

You may need to flush out all the old DOT 3 air may be in the ABS crap

 

My brake pedal goes to the floor.....the pedal is hard till I start the engine.

 

Did you forget to connect the power boost vacuum line

Other than that I think something was installed wrong

It does sound like the power booster