Oh, yes, I should have mentioned that I did check all the ground connections. On this car they are actually around front under the battery (a particularly bad choice in my mind since they can easily get corroded there). I also checked the resistance of each injector at the ECU wiring end to be sure that they were properly wired and grounded.
I think that I have the contact trigger points working and connected properly with the second replacement distributor. But that certainly was the problem for more time than I care to admit...I wasted a lot of time and effort while I assumed that a newly rebuilt distributor was working.
What the throttle switch does do on my car is to send a series of pulses to the injectors when you open the throttle. If you turn the key on, but do not start the engine, you can hear a series of "clicks" every time you open the throttle. Every time I have done this I get a series of pulses on injectors 2-4-6 only.
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