The spark and injector clicking do in fact get triggered together under constant and regular throttle action with no throttle stomping. However, when one tromps on the gas there is a micro relay on the turntable on the pedestal that has the rods to the throttles. When you turn the
turntable to engage the micro switch it triggers all of the injectors at the same time to enhance the gas mixture for engine acceleration, independent from the CPS signal. I have used this technique to check the clicking for years and several times each year to verify that injectors are able
Doing that now gets no injector clicking at all. I use this technique to verify that if there is no injector clicking then the culprit must be the CPS because this test tells me that all injectors are clicking and are able to click if the CPS is working. Since I now
cannot get this test to pass it tells me that the injectors will not click, CPS or no CPS. It also means that there is no injector trigger voltage at all regardless of CPS or not.
So I need to check for voltage at the ECU and at the injector firing circuit. Where do I find those
points to check for +12V? Where are the ECU and injector power supply relays?