I think the ECM supplies a ground to make the injectors fire. Do you have a noid light? It plugs in where an injector would go and will blink if it gets signal to pulse. It could possibly be the anti-theft system not allowing the injectors to pulse. Get rid of the VATS if possible.I am getting voltage to injectors and the injectors check 15 ohms unplugged ,,bled the schrader valve at the regulator so it is getting gas and fire ,but wont run unless i spray starting fluid,,mabe teh new Chassis diagnostic machine at dealership can find it the SnapOn hand held says all systems correct.
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