Ser#b875b03690d 2.4 gm lpg. Engine cranks no start. No power to ignition coil. New cam and crank sensor. Sent engine ecm out for testing came back with every thing good.engine has oil pressure 30 psi. On the left side of engine and transmission in the engine compartment there is a 5 prong wire connector that nothing plugged into it. It looks like there was a relay plugged into it. Harness has a tag on it #cps 206 any help is appreciated thanks