todays test:
small ge47 light in stalled in place of an injector (just unplugged the harness from the injector, then plugged in the light to the harness) started the spare engine, starts right up with obvious miss, but light is flashing so I know that works with the good ecu. turn off engine.
Next hook up spare dizzy in P with the existing one (I have the installed one hard wired to the module so I left it in circuit. with ign in the run and the fuel purged via the fuel pressure gauge so as not to squirt gas into the engine from residual pressure, I manually spin the spare dizzy by hand, can hear the injectors fire and can see the light flash. That test the spare dizzy. ign off
install spare bad ecu, ign back on, spin dizzy light flashes. hard to say if it was noticeably not as bright a flash or a duration of flash, but it did and the injectors were clicking as well. So the bad ecu def is functional just seem way to lean. I test this by trying to start it again,m would run for a few seconds (fuel pressure good, light flashes, spark there) then stop. If I depress the AFM flap manually.it will idle, if I throttle up while manually depressing it can transistion to running on its own but will forward fire (back fire thru the AFM) if I start to back off the throttle. It actually launched my poorly attached AFM, nearly hitting my parked Z.
Clearly it wants to run lean. I wonder if I need another sensor/s input for this one,. it appears to use all the pins (they are all there and soldered to pads with traces). Maybe an O2 and/or a altitude sensor? I wonder if its seeing a high altitude (I am at sea level) with NO sensor and leaning the mix out?