I have a 97 ford f150 4.6l 4x4 and it sat for like 4 years. At one point the master cylinder caught on fire due to a recall it has. Replaced the master cylinder and brake booster and almost all the brake lines. When I push tge brake pedal it wont return the hole way out. I hav to use my foot to pull it out. I can feel the brake release the hole way when I pull the pedal out. Everyone said the brake booster but I replaced it and no change. Any suggestions?

 

Disregard this post. I figured out the problem.

 

Would you mind sharing with us what the problem was? That way, may help someone in the future.