2001 Mazda Protege car does wont star

I bought it with bad head gasket and after I did the head job on it it wont star, I chech and triple check all my grounds and wires to be in a good condition and continuity test.
but the car wont star do to no spark no pulse
2001 mazda protege 1.6 engine it wont star no spark needier injector's pulse, car spark only one time and send pulse only ones as well then nothing I own 2 exactly same cars, same year, same model, same engine same ecm number and I already replace the following parts from one to the other ignition coils, cam sensor, crank sensor, ignition switch, ecm, mass air flow sensor, relays in the engine compartment, and still no spark needier pulse, all the parts are in good working order coz one of the cars runs whit all the switch parts but no the other, please help me I and getting frustrated with this car I dont know what also to try tnx