Cannot get the brakes to pump up?

Hi,

If there are no leaks, there is likely air still in the system. If you are getting no pedal pressure at all, recheck your work. Make sure the master cylinder is fully tightened against the brake booster.

I'm not sure if you bench-bled the new master cylinder, but here is a link that explains how
to replace the Master Cylinder and bench bleed the new Master Cylinder.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

If you look at the attachments below, they provide the directions for brake bleeding specific to this vehicle. (pics 1 and 2)

If the vehicle has ABS, follow the directions in pics 3 and 4.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.