More then likely you have one of two things. Either air in the system either from a leak or it just has not been bled out, or you have an internal leak allowing the pressure to bleed out of the master cylinder.
Here is a guide that will help with this basic information but we need to start with checking for external leaks. If you find any we clearly need to fix those and bleed the brakes.
https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor
If there are no external leaks, I would suggest bleeding the brakes just to see if you get any air out. If not, then I suspect the master cylinder has an internal leak.
https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system
Also, I had the admin remove your personal info from the post. This is a public site and all can read that info so we would hate for someone to get a hold of that info.
Let us know if you find leaks and we can go from there. Also, can you let us know if there is any history to this? Did this just start or did you just make a repair to the vehicle?
Thursday, May 21st, 2020 AT 11:24 AM