Brake bleeding issue

It sounds like either you have air in the master cylinder or the rear plunger has failed. It could also be a plugged proportioning valve.

If you have someone step on the brake and crack the rear line lose on the master what kind of flow do you have there? Note do not let the brake pedal up until you re-tighten the line or you will let air into the master.

Rich

Here is a brake bleeding guide to help also a low brake pedal troubleshooting guide as well:

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

and

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

Please run down these guides and report back.

I put on a new master cylinder that seem to do the trick so far. Thank you for all the input.

Sure, let us know if you need anything else.

Rich