No brakes pedal goes straight to the floor

[justinddelfosse]

I have a 2001 Honda civic lx and my brake pedal goes straight to the floor and I can't stop my car. I've replaced my master cylinder and booster. I've checked my pads and calipers and they are fine. I've also checked all my lines for leaks, dry rot and cracks, with no problematic results. Any ideas on what could be causing a spongy pedal and no brakes.

Sent from my SM-G930T using Tapatalk

 

[justinddelfosse]

Sounds like a classic case of air in the hydraulic system.

Did you bench bleed the MC prior to installation?

Did you do a thorough bleed of all 4 wheels in the order specified in the service manual?

I bench bled the MC and bled in the proper order yes. The only thing I didn't try was a pressure bleed

Sent from my SM-G930T using Tapatalk

 

[justinddelfosse]

Describe how you did the bleed.

To bench bleed the MC I set it up in a vice attached the bleeding adapters and hoses that came with the new MC, and looped them back into the MC. From there I filled the MC and used I screw driver to push the valve control on the MC until no air was coming through the lines. Closed off the system, hooked it up to the new booster and reconnected the lines. From there I bled each tire according to the Haynes repair manual manual which is FL,FR,RL,RR.

Sent from my SM-G930T using Tapatalk

 

[justinddelfosse]

By what method?

I had my friend who goes to school with me at Lincoln tech on the pedal while I opened and closed the bleeder valves.

Sent from my SM-G930T using Tapatalk

 

[justinddelfosse]

Sounds good.

My recommendation would be to redo the bleed by the same method and push a lot of fluid through each wheel while ensuring that the MC remains full.

Alternatively, try another method, for example a pneumatic bleeder like this:

https://www.harborfreight.com/brake-fluid-bleeder-92924.html

Alright. I'll try that. Ill get the bleeder tonight after work

Sent from my SM-G930T using Tapatalk

 

[justinddelfosse]

Here is the proper bleed sequence for the method you and your buddy used:

View attachment 29755

I pressure bled the system and used a scan tool from my job and it fixed the system. Thnx for the help

Sent from my SM-G930T using Tapatalk