“....Injectors are NOT designed or intended for a full 12V...in fact, applying this voltage directly would overheat and kill an Injector short order (and guys who have applied a full 12V, even if only for test purposes, have lunched Lord knows how many like that)...DON'T DO IT!...

OK, about now I’m feeling pretty lucky that I got away with running 12v through my injectors, albeit only applied in quick rapid clicks, while back flushing them with pressurized (~28-29 psi) carb cleaner. Oh well it worked and I was able to actually capture some dislodged particulate and get them unclogged and flowing equally. Reconnected them to the car’s fuel rail and wiring and connected clear “catch tubes”. Then I pulled the distributor out of the engine and removed the cap - left the rotor in place and trigger points connected. I may have disconnected the primary coil wiring to protect the points from frying, I don’t recall. Then I turned on the ignition to activate the pump and d- jet system. Then I turned, turned, turned the rotor with my finger as fast as I could. The catch tubes captured the injected fuel equally across all four. By simultaneously sucking on the MPS hose and propping the throttle open or closed I was able to see some variation in injector flow. No vacuum on the MPS combined with wide open throttle provides the greatest fuel flow while high vacuum on the MPS combined with closed throttle provides the least flow. I know this sounds like rather crude testing but if nothing else it provides an “indication” that the injectors, trigger points, MPS, and TPS are at least functioning somewhat like they should. Plus you may find the visual of some guy spinning the distro with one finger while sucking on a rubber hose to be somewhat entertaining.