Soft brake pedal only with engine running

[themechanic]

I only had one leak in this all new system. BTW, converted from 4 wheels manual drums. The new prop valve leaked at one brake line connection. Tightened and sealed it. Filled the MC after bleeding brakes and no more fluid loss anywhere.

I may just have to remove the power booster and MC and put a 15/16" manual MC on it.

 

[MWbirdLOVER70]

Sunyat Power Brake Booster Pushrod Pin Adjustment Tool (Blue) https://a.co/d/8c9xzGp

Thanks brother

 

[desotoshane]

I have the same booster and have the same problem. Is yours a oem or reproduction?

 

[desotoshane]

I see you didn't mention what booster you have I read to many post this morning. What booster do you have?

 

[themechanic]

I have the same booster and have the same problem. Is yours a oem or reproduction?

I see you didn't mention what booster you have I read to many post this morning. What booster do you have?

I have the reproduction double diaphragm booster sold by Pirate Jack and many others.

 

[desotoshane]

I also have the pirate jack booster and have the same problem. Although this weekend I swapped it out for a oem remanufactured booster and still have the same problem so it's not the booster. I did notice something else I'm going to try this weekend.