If it happens and has trouble even with the pedal pressed, ever think it may be the TPS, its a long shot but its reletivily cheap and sounds like it could be that.

Now when i first got my truck I had an issue with a rocker sensor and when ever i took a turn to hard sometimes my motor would cut out for a few minutes.

Pull your spark plugs and see if they have any carbon build up on them, also look in the dark to see if a wire is cracked or split. Did you ever take distributor out? If so it might be timing is off.

Have you thrown some throttle body cleaner in and changed fuel filter, and done basic tune up in awhile? I know you said rotor and cap are ok.

If not that than it still sounds electrical.

My rocker sensor or any sensor for that matter that has to do with a instant shut off will not show a code. As far as i know when it goes off. It might log it somewhere but i am not sure where it would log it at.

Hope this helped a little, if not let me know and i can keep doing research.