Machine came in with a bad ECU and other problems after some one either tried to incorrectly jumpstart or crank with low voltage.
ordered new ECU from Local Dealer and installed. It now cycles the throttle and turns the fuel on as well as the relays. However when i try to start it fires 1 time then shuts down. Tests show the the trigger from ecu to coils is cutting off after first fire. Oddly though when I was testing to see if it was fuel or spark if I gave it a little extra LPG fuel through the PCV hose (yes i have a way to allow low pressure vapor into the engine since old school methods mess with sensors these days) while cranking it would fire then not fire for a moment then catch and run very well until shut down. Then i would get the one round of fire just enough to kick the starter out.
New parts already are ECU, Vaporizer, Crank and Cam sensors,
Parts swapped with Known good unit Injector, Assist Injector neither of them changed situation and other machine worked fine with this machines parts. When I have it running no check engine light. I have the schematic and all inputs test ok to the ECU.
Not sure which way to go next.