Thanks to all who helped me with this. I backed off 20 paces and began throwing parts at the car. I amassed a goodly selection of parts in preparation, but I didn't use them all.

It turned out to be a failing AMM. I picked up a used one on ebay ($25.01)last week. When I plugged it in, all my problems were solved.

A couple of interesting things happened in this 2 week process:

1) I noticed a leak in my breather box and replaced it (the whole system). All the oil I had been leaking for a year was from this leak, not from a cam seal like I thought. I am leak freakin free (knock on wood)

2) My large clock started working. It has shown 12:00 for all the time I've had it. (I cleaned all the fuses.)

I started working a little before 5 a.m. yesterday and wrapped up a little after 5 p.m. All day working on a 240---it doesn't get any better than that!

Thanks again for all the advice. Without the Brickboard, I would have thrown a sledge hammer through the windshield a long time ago.

Wiglaf

A known good AMM may not be easily had. What I did is remove the amm (I think it's covered in the FAQs, don't do it while car is running). If car runs the same without it as with it, then the amm is usually the culprit. That was the case with my 88 240

Check and make sure the injector clips are clean. The back two can get corroded. Sometimes just pulling them off a on cleans tarnish off of the pins. Some old style T.V. tuner cleaner protects these connections for me.

I had an annoying miss in my 240 that turned out to be a failing AMM. The best way to test is to swap in a known good one.
Dan

I would do a complete Tune up before winter & replace that fuel filter. A diry or clogged fuel filter put more strain on you fuel pumps as well. I would even change the on in the tank. I would bet it has never been changed. Do the basic thing first go from there.