Mazda Repair Questions? Ask Mechanics for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.If you are sure you have power at the injectors then take a standard 12 volt test light and place the test end on the power side of the injector connector and the ground end on the other side and then crank the engine over. If you have injector pulse the light should flash. The ECM needs good powers and grounds and 5 volt reference and good tachometer signal for the ECM to pulse the injectors to ground. The negative side of the coil goes to the igniter inside the distributor to get pulsed to ground. The negative side of the coil also goes back through a 1000 ohm resistor inside the coil and then out the White wire to the ECM and to the tachometer on the dash.
When you say it dose not light up are you saying you have no power to the injectors with the key on?
The injector are controlled by the ground switch signal from the ECM, if you have good spark the the ECM should see that signal and drive the injectors. Are you sure you do not have a bad ECM?
Are you getting power to the injectors?
Okay then you loosing the ground switching signal from the ECM and if the ECM work in another truck then you are lacking something and I would suspect its a wiring concern.