bjreed1119

Greetings all. My wife and I just bought a 1978 280z (MT) and this is my first post on the site. I’ve been changing out the fuel injector electrical connectors with a Bosch upgrade part. I can tell that a previous owner had spliced in a pigtail connector, and having seen what he did with other electrical work, I decided to check his work by going to the FSM wiring diagram and testing which of the two wires goes to the terminal on the ECM connector. The wiring diagram for each injector identifies two wires, the left wire connects to the dropping resistor, while the right wire goes to the ECM connector (in the wiring diagram I've attached, for fuel injector #1, “Black 37” goes to the dropping resistor and “Black 15” goes to terminal 15 on the ECM connector). So when I checked the terminals of each connector with my multimeter to the ECM connector, the wiring of the injectors was not consistent (4 injectors had the ECM wire going to the left terminal on the injector, and 2 injectors had the ECM wire going to the right terminal on the injector). Here are my questions: 1) Does it matter which terminal the ECM wire connects to? If the ECM wire is just supplying the ground to a coil, is the direction important? I think they should be consistent—and plan to change that when I build the new connectors—but will it hurt anything if it is on the “wrong” side? 2) If the direction is important, what is the “correct” side for the ECM wire to connect to when looking at the actual fuel injector? For instance, when looking down at the injector, does the left terminal on the injector (the one nearest the front of the car) correspond to the left terminal on the wiring diagram, and does the right terminal on the injector (the one nearest the firewall) correspond to the right terminal on the wiring diagram? Is my labeled pic of the injector and connector correct? Any help would be greatly appreciated.