Ha, surprise: as of lunch today, I confirmed that my "new" Autozone injector is not firing. I have a weak cylinder somewhere too, so currently, I'm running on 2-3 cylinders depending on the wind direction.
On the weak cylinder, if I unplug the injector, the idle rises for a 1/2 second, then falls again. when I reconnect it, the idle does the the same thing: rises for 1/2 second, then falls. Wierd. Usually, there's a definitive & continuous fall of rpm followed by off-cylinder vibration when you unplug one injector.
For now, I just unplugged the Autozone injected cylinder, I might do the same on the so/so cylinder: wonder if I can make it home on 2 cylinders??
I have a very steep 200' hill to scale on my way home today: this is gonna be interesting!!