hello, I have a '83 280zx turbo. Me and my mechanic cannot find the cause of my Z to not start after running it. He said I'm losing the negative pulse from the injectors to the ecu but he cannot pin point it. The car wont start after you turn off the engine. It will only start after the engine has cool down for several hours. We already replaced the AFM, new distributor, new ngk wires, new fuel filter. We already checked the ECU and its working fine. Checked all the wirings, fuses, and relays, coolant temperature sensor, and still have the same problem of not starting after a good run when you turn off the engine. Need all your HELP please !!! Thank you.