I am new to the forum and hoping with the help of fellow f150 enthusiasts I can figure this out.

I bought a 1986 f150 4x4 5.0 EFI automatic for my daughter recently and it has a stalling issue. The truck will idle all day long. It takes full throttle in gear and out no problem. The issue is under partial throttle from a stop and while cruising with foot lightly on throttle. It isn't a miss for sure. In both instances it seems like it completely looses power (electrical not engine power). It starts right back up with no issue.

I have replaced the cap, rotor, wires and Throttle position sensor with no change.

Thanks much for any help

 

Try pulling codes.
See link in my sig below if you don't know how.

 

I got one code if I'm doing this correctly. Code 63. Throttle position circuit low voltage?