[1982 280zx none turbo injector only get signal if one is unpluged]

But these have power when the key is off?

[1982 280zx none turbo injector only get signal if one is unpluged]

Well should there be constant power to the injectors even when the ignition is off?

[1982 280zx none turbo injector only get signal if one is unpluged]

Well you just lost meat fsm? And meter?

[1982 280zx none turbo injector only get signal if one is unpluged]

I'm not sure how to check the efi ground? 

 No it does not get a ground signal to the injectors. I think the test light may be suplying the ground but it will not run wirh all pluged in and test light conected to to wire to the conector.

[1982 280zx none turbo injector only get signal if one is unpluged]

I just checked the single wire going into the ecu and it is sending a pulse.

[1982 280zx none turbo injector only get signal if one is unpluged]

I just checked the single wire going into the ecu and it is sending a pulse.

[1982 280zx none turbo injector only get signal if one is unpluged]

is it a ground or ecu?

[1982 280zx none turbo injector only get signal if one is unpluged]

yes with any of the six unpluged but only idles. Unless test light is on the one side then it will rev

[1982 280zx none turbo injector only get signal if one is unpluged]

11 minutes ago, jonbill said:

so it runs with any 5 of 6 injectors plugged in and any 1 of 6 disconnected? or is it a specific one that has to be disconnected? 

 

[1982 280zx none turbo injector only get signal if one is unpluged]

Car will start and idle if one injector conector is loose.it wil actually run on 5 cylinders and rev with throtel if i have a test light atached to one side of the conector but not the other side of the conector .both sides will light up the test light though. Even with the ignition off both wires to the injector conector will light up the test light. If i plug the conector back in it kills the engine.both wires still light up a test light.