My pedal can be pushed about 3-4in before the trucks starts braking, and makes a gooshing sound when pressed, ive replaced the master cylinder, brake booster, pads,rotors,and back brakes are almost new, im soooooooo fustrated with this problem that it makes me wanna sell the truck. when i bough the truck a year ago they were right at the top of the pedal and worked great. but now even after replacing everything and have an abs computer hooked to the truck, they still do the same thing. PLEASE HELP!

 

Do you have any air in the lines? Did you bleed them?

 

had them blead by the computer/scanner and then by hand, still spongy

 

I'm in the same boat, let me know what you find out.

 

You've done alot but don't give up it something little vacuum or something leaking ive been frustrated before to drink some beers calm down and find the problem breaks are pretty simple system do you have any abs lights on

 

A guy wrote something up yesterday or the day before on here.. he had all the same issues and he ended up adjusting the rod from the brake pedal to the master cylinder.. fixed his and I'm gonna try it when i get a chance cuz I have the same issue. I'll try to find it and post his info its detailed on how to do it.

 

If you crawl under the dash where your brake pedal is and look up, you will see the the rod attached to the brake pedal. Carefully remove the cotter pin and slide off the rod and brake light switch,carefully remove the brake light switch from the rod and move it off to the side. there is also a plastic bushing that sits inside the rod hole remove it as well, that rod is adjustable by turning it. Make sure you keep track of turns or make a mark on the rod flush where it meets the booster. Turning to your left will extend the rod and to your right will shorten it. Like I said before, I did 5 turns at a time then connected it back up and while I was under there I reach up and started the truck and pushed on the pedal for the right feel. I turned it out 30 turns in total and the pedal was good and tight, i then took it out for a test drive and my brakes were draging a bit so I turned it in 3 turns and now have a good tight brake pedal and braking power is a lot better. I dont think this is a fix for all spongy brake pedals but worked for me. I will try to post some pics.

 

ive tried that brake pedal adjustment, its not that its to far up, its just that their sooo spongy

 

you bled the cylinder before you put it on and you bled every wheel starting at the right rear, left rear front right and left front?

the brake booster is installed properly? no leaks in the vaccum house?

 

brake booster and master cylinder both installed right by me and my buddy (who is a mechanic) and i replaced the brake line going to the intake, then new pads and rotors on the front and bled them manually