In thread:

https://www.fordforum.com/forum/gene...s-floor-24307/

I describe my problem. As I say there, maybe my brake booster is worn and moving so that my pedal goes lower than it should.

I wonder if anybody out there has a similar E or F series van or truck and can help me. If there is, could you have someone watch the end of the master cylinder while you press the brake pedal with the engine running. I'm hoping yours does not move at all.

My MC moves. Not much, an average of three measurements with the engine running gave 0.0128 inches. Not much but looking at the mechanical advantage of the brake pedal, I'm hoping this is too much and I need to replace the booster.

Thanks In Advance,

Pete