Hi, I am a professional certified mechanic, with an engineering background, and 35+ years experience. I will do my best to assist you. Also keep in mind I don't know if you are a pro or a novice, so feel free to add any additional info at any time.
I did some checking repair manuals for the esablihment, no luck. I am being told they haven’t been sold in 20 years. You can get s Ford manual for the econoline pretty easily. There were two different ignitions used on this year model, one was a TFI system it had a lot of problems, the module mounts the the distributor. The other ignition was the Duraspark II, it is an aluminum box, about 4 times the size of a pack of cigarettes, and it had two plugs on it, mounted near the distributor normally. These were a lot better, but they still bail out sometimes. If you need either one of these look at the link HERE, and HERE, both have free shipping, cheap too.
I would still check the fuel pressure, it sounds so so much like fuel starvation. Try to figure out if the ignition is acting up by plugging an extra spark plug into a spark plug wire, and drive it to see if the spark cuts out. Sometimes you have to drive these with the engine cover off, it is really HOT when you do this, so make it quick, and do it with the engine cool, it will get real hot real fast. I am still digging for a The Establishment manual, it don't look good though. The Ford manual is no problem. Go over all of this and if you have any more questions at all, let me know I will help. Good luck with it, have a great day, and Thanks for using Just Answer.
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