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About G30van90

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  1. Hello all, I am in serious need of some help on my 1990 G30 van auto. It has no spark and the injectors are not firing. Things i have done: Tested pick up coil. Verified powers and grounds to ECU Verified 12v at injectors. key on continuity checked all 4 ignition module wires from ECU connector to module. tried to ground ppl/wht wire from ignition module (read that would send a signal to ecu to fire injectors). tried 3 different ignition modules. swapped ECU's I am very unfamiliar with TBI and the ignition system on these old vehicles. I am clearly missing something here. Any advice could be greatly appreciated.
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