Jul 17, 2013 #2 E earlbrown runs with scissors Joined May 26, 2001 Messages 7,541 when you unplugged the orange wire you killed the ECM. With it powered down there should be no fuel pump signal. Once the oil pressure comes up, the pressure switch should fire the pump but you still won't have spark.
when you unplugged the orange wire you killed the ECM. With it powered down there should be no fuel pump signal. Once the oil pressure comes up, the pressure switch should fire the pump but you still won't have spark.
Jul 17, 2013 #3 A aminga Chicks Dig the powerbulge Joined Dec 15, 2003 Messages 5,578 ECM controls the prime.