Here is the situation. I had the left front caliper lock up on me on the way home a little while ago. I replaced the caliper and after doing so, I had a low pedal. All the air was bled out and still the low pedal. I replaced the front brake hoses thinking that the hose may have ruined by the excess heat generated from the locked up caliper and no luck. I just replaced the master cylinder with one from ford and no luck. All the air has been bled out of the system. All the fluid has been changed. Any ideas what it could be. I don't want to throw any more money at it without a plan of attack.