Hi again everybody
So here's the latest...My 86 240 was dying when it would warm up to operating temperature. I started by cleaning the throttle body, IAC, all grounds I could find, verifying TPS works. The fuel pump relay is fine. I did the "y jumper" test that Bruce wrote about. Also as Aye Roll advised, rechecked the AMM and connections (I replaced the AMM about a year ago when it went bad). All of these checked out good. I suspected the coil as it was getting very hot and the resistance of the secondary was higher than specs. I replaced the coil(against advice from some of you here.....I should have listened!!!) and of course it didn't help. It did the same thing as before. Runs nice at idle for a few minutes until it gets warmed up then dies. Somewhere in all of this (while I was working on it today), I have broken the plug housing for the Hall Effect Sensor. I now have no spark at all. I did the test on the plug and got the 11 volts on one, 5 volts on another, but the ground was showing about 38 ohms when the test procedure in the FAQ's say it should be close to zero. That makes me wonder if there is a problem somewhere with the control unit. I know now for sure that I will have to replace the Hall Effect and/or distributor because with the ignition on, when I wiggle the now broken housing, I can hear it make contact and hear the fuel pump kick on and off. That will be real fun since the distributor doesn't even want to turn let alone come out. So I'll try to get this swapped out, but in the meantime, if the ground on that one connection was too high, what might that be?

Hey Aye Roll, I looked for that plug in the harness that you put a picture of, but I can't find it. I traced back from the coil as far as I could even opening some of the harness but I just can't find it. Some fixes had already been done on this car before I got it (main fuse, holes drilled in fuel pump relay housing, etc.). Could that potentially explain not finding it?? Or just me? :)

Thanks for all the help so far!!