Brake issue

[clittrell]

Hello everyone, I need help diagnosing a brake problem i am having. The brake pedal will go all the way to the floor when you press it. There is no brakes when going at any speed. We have changed the back calipers, front and rear brakes, brake master cylinder and the hydrobooster. I have bled the master cylinder and the brake lines with good return of fluid. I cannot get the brakes to respond to anything i am doing. The brake gets harder when trying to bleed the brakes but then it continues to go the floor. I cannot figure out what may be going on. has anyone had this problem before. I even changed the emergency brake pads

 

[chopperman1]

You still got air is my guess. Bleed the whole system again. Start with rear right, then rear left, next front right and finally front left.

 

[jws123]

I is a very simple system either air in lines, Broken/leaking line, Bad master cylinder.

 

[Sherman Bird]

Hello everyone, I need help diagnosing a brake problem i am having. The brake pedal will go all the way to the floor when you press it. There is no brakes when going at any speed. We have changed the back calipers, front and rear brakes, brake master cylinder and the hydrobooster. I have bled the master cylinder and the brake lines with good return of fluid. I cannot get the brakes to respond to anything i am doing. The brake gets harder when trying to bleed the brakes but then it continues to go the floor. I cannot figure out what may be going on. has anyone had this problem before. I even changed the emergency brake pads

You may have installed the calipers upside down on opposite sides causing the bleeder screws to be under the piston boss (bottom) instead of above (top). You'll get fluid all day long, but will fail to get rid of air, seein' how air rises in fluid!

 

[Davood]

Sherman, your answer is spot on, but have you seen anyone do that?!

 

[GTyankee]

I have seen where it had been done on one of the Motor Trend TV shows where they repair customers vehicles

I believe it happened when a person was upgrading the brakes from drum to disc

 

[Sherman Bird]

Sherman, your answer is spot on, but have you seen anyone do that?!

Yes, I've seen it several times over the years. My next door neighbor did it recently on his 2012 Jeep Patriot. After doing a brake job with new front calipers, he went through 2 gallons of brake fluid before he knocked on my front door in frustration, asking for help. I walked over to his car and spotted the problem immediately. He swapped them, we bled it out in 5 minutes, and, as is said... "They lived happily ever after"!