[Targalid]

Derek,
I had a similar issue recently. The air would not leave the master cylinder after I had worked on the brakes. Just by chance, I filled the reservoir, had the front of the car up in the air to re-bleed the front brakes and suddenly the reservoir fluid level went from the top to the bottom and I had a firm brake pedal. Then I filled the reservoir to the top mark. There must have been a large air bubble that finally worked its way out. Look at the angles at the master cylinder and maybe you will see how to help the problem by adjusting the angle of the master cylinder. Possibly you can loosen a brake line at the master cylinder to allow the air to exit. Good luck! .