[jdl]

As far as voltage to the coil B+ primary terminal, I'm not sure how you checked for that voltage, the engine has to be cranking or there won't be anything.

That voltage comes from the asd relay. The asd relay supplies voltage to the coil--injector/s and the heater circuit for the 02 sensor.

The voltage for the coil side of the asd relay comes from the ignition switch, goes hot when you turn the key on. The voltage for the switch side of the asd relay comes from a fuse link, hot all the time. The asd relay will not energize unless the computer grounds the coil side of the relay. I could go on, but, I think you need to check some of the circuits already mentioned. This was for a B150 van.