Mykrazy

I have a 1977 ford F150 you depress the brake peddal and it stays to the floor, replaced master cylinder and booster both. Now you can pull the brake peddal back up and the truck does stop when the peddal is pressed it just will not return. Somebody mention a brake return spring that goes under the brake peddal but i have yet to find this animal. PLZ PLZ help

interstate2006

8 to 10 inch spring under the dash, hooks from steering collumn down to the brake pedal , also try and spray the pedal linkage.