i have 1994 2500 2wd w/12valve.i have just completed a brake job,done right,new rotors, calipers,pads,rear shoes,springs,wheel cyn.new lines front to rear,and new master cyn. all bleed well.i have great pedal unill truck is started.pedal then goes to floor????? help. thanks,oakie

 

hey oakie can you please add the info about your truck to your sig. it will keep you from having to type it everytime you have a problem. your also in the wrong section. as for your issue sounds liek you have a leak somewhere. did you double check the lines behind your? gas tank

 

Speaking from experience here, what type of MC did you use? Brand new or a reman?
My truck had a bad MC, took it to the shop where the put 2 remans on it and one new one.
The new one worked without a hitch.
I would start there.

 

bleed the brakes with the truck running...

 

thanks for help. new master solved problem.