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When you have injector 1 and 2 firing at the same time you won't be running right. The injectors spray a mist and that is what is ignited. If your spark and fuel are not timed correctly you will not have proper ignition of the fuel causing your problems. Since you already tested the injector and no voltage from the ecu then you probably have a fried injector driver. Replace the ecu and re-wire injector 1 properly.
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