I'm just looking at post #73. Good engine has initial drop/snap back as engine first fires and settles at 21. This is still higher than I'd think it should be (would be only 11 mmhg vacuum). Bad engine has initial drop, but no snap back, it returns gradually to 26, so only 4 mmhg vacuum at that...
So I'm not sure. The MAP is initially appropriate, ~15. Then the IAC keeps opening and the MAP increases, which would indicate more air getting to the sensor via the IAC, throttle open, or leak. The injectors look to be responding appropriately to the MAP and RPMs. If this was unmetered air the...
You should only have 3 wires in most cases to the coil. Choke, resistance and starting. Disconnect all but the resistance wire. However it should still run fine with 12v until you fry your points. Also make sure that you have an external resistor coil.