Parksie I had a similar problem with my F250 eventually replacing every electrical component under the hood sometimes several times. I took it to a friend of mine who owns an auto repair shop to hook it up to his computer several times the only thing it said was a bad egr(BS!). The problem was eventually a 20 dollar part aka the stator. The stator is inside the distributor, so you have to pull the distributor out ,marking everything and being very careful. All the problems went away! Amen! Let me know if this helps at all. Fords forever, Steve.