Sport trac P0320 after 20-30 minutes

Fuel pressure steady 49-52psi running. No marks on sensor of any form from surface contact with reluctor wheel. Plugs and wires are brank new and tested for any form of electrical leaking. The engine speed DTC is what I've been attempting to diag. For 2 days without throwing parts at it. Could the coil overheating cause this issue? Or possible wiring getting hot and losing connection?

Going to clean all grounds and run ohm tests tonight hopefully findings will show me something useful. If not I'll reflash PCM Saturday. Thanks again for the help, if I come to a conclusion that doesn't require a high powered rifle aimed at ford emblem on front I will be sure to post.

Update on sport trac! All of the items above plus, Replaced coil, disconnected all 02s trans output shaft sensor and intermediate shaft sensors both ohm in spec and checked trans harness for any damage. Ckp tests perfect (tested with snap-on verus and Ford IDS), tried all sensors possible. This thing is killing me! Does anyone have any possible idea of where to go from here. Vehicle will only stutter after running 20+ minutes with hood closed and will only do it sitting still with brake depressed while on throttle or accelerating from dead stop until speedometer moves off of 0 mph then runs great.

Also have replaced computer, and run new wire and pigtail from pcm to ckp.

Have not tried that yet as of my mind being stuck in "electrical failure" mode I suppose. Will try that this afternoon after work.

Baffles me because vehicle WILL NOT do it until running for 20+ minutes or longer with hood closed dependant on ambient temp and will not do it unless in gear and from a dead stop or if "power breaking" and only does it until speedo needle moves from zero.

Hello good day, I would like to know if you found the problem of the vehicle, because I have a Ford Explorer Sport Trac with the same fault I just changed the distribution and it looks like this, I don't know what else to do, I have already done everything, the same that you have done and I have not managed to solve the problem, I hope you can help me I would be very grateful since I don't know what else to do.

Hola buen dia, me gustaria saber si encontraste el problema del vehiculo, porque tengo un ford explorer sport trac con la misma falla solo le cambie la distribucion y quedo asi, ya no se que mas hacer, ya le he hecho de todo, lo mismo que tu has hecho y no he logrado solucionar el problema, espero me puedas ayudar estaria muy agradecido ya que no se que mas hacer.

It was the harmonic balancer, once engine was warm the rubber between balancer sections would become soft and allow the balancer sections to deflect from each other and throw the timing off.

Hello, thank you very much friend for the information, but what do you say the ammonic balancer, maybe it is the one with a separate chain in the carter or is what we know as the balance bar that takes with the chains of the camshafts.
I thank you in advance for your help.

Hola, muchas gracias amigo por la informacion, pero a que le dicen ustedes el balanceador amornico, talvez es el que lleva con una cadena aparte en el carter o es la que conocemos como la barra balanceadora que coge con las cadenas de los arboles de levas.
Te agradezco de antemano por tu ayuda.

Do I have to change the balancer or what part of the bar should I change? Or what parts are changed friend.
 tengo que cambiar el balanceador o que parte de la barra debo cambiar? O que piezas se cambian amigo.

Friend, what causes these rubbers to soften, or is it normal for the time the van is used? Sorry for so many questions friend, but this fault has given me many problems and I want to learn, thanks.
Amigo, cual es la causa de que se suavicen esos cauchos, o es normal por el tiempo de uso de la camioneta? Disculpa tantas preguntas amigo, pero es que esta falla me ha dado muchos problemas y quiero aprender, gracias.

Excuse me friend, the harmonic balancer I think it is, what we know as a balancing pulley, right.
Disculpa amigo, el balanceador armonico creo que es, lo que nosotros conocemos como polea balanceadora, verdad.

Yes, it is the main crankshaft pulley that runs the belt drive system and helps prevent engine vibration. The rubber between the two sections degrades over time and eventually fails.

Thank you very much friend, today I am going to prove that to you and then I tell you how it went, I am very grateful for the information.