Hey out there
I Have a 91 f150 351w 4x4 . The other day I was at the store and the sucker just would not turn over. Key turns power comes on, but no start. I can jump the starter relay and she starts up and runs fine. Today I pulled the cylinder and replaced it with new key. Not broke but real close. I also replaced the starter swich on my collum. I am still not getting the starter to engage. The key rotates, locks, unlocks and power comes on. It just feels real soft going into start. I had had problems with the manual shifter getting stuck in reverse for a bit when this all started. With a little firm guideance it will start moving freely again. I monkeyed with the Manual lever position sensor(aka neutral) and linkages to it. All moves smooth and easy. Yet once in a while it will get stuck in drive or some thing. My dad on the phone is preaching Neutral start switch. I think it is inside the collum? Any and all help is awesome.

 

Could Be A Wire Chafing In The Collum Or Your Dad May Be Right After All

 

The actuating rod from the tumbler to the switch also could be out of adjustment.

You can by-pass the neutral safety switch using a wire loop.
Doing this will be a sure fire way to figure out which area is bad.

Column



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The actuator rod was broke. It realy is a big pain to get that joker out. Took me about 4 hours to get it all done. Now I am having trouble getting the starter switch in the perfect position. Some times she starts some time she don't. Thanks for the help.