I own a Nissan 300zx Z31 1985, a car which has been having the same recurring problem almost a dozen times now. I am usually able to fix this issue, however the fix is never successful permanently. This time I cannot fix the issue. The car runs and drives but will always die aprox. 47 seconds after starting it. It seems that once the fuel pump stops priming fuel to the engine and shuts off, the car stutters and dies very shortly after. Usually I disassemble the Mass Airflow sensor line from the air filter to the engine and make sure everything is tight and secure, and it often works for a few weeks before I have to do it again. I have tried to find vacuum leaks using Starter fluid however I have been quiet unsuccessful. I have swapped out the following in order to try and fix this problem: - Mass Airflow Sensor - Air filter - Fuel filter - Fuel Pump - Spark Plugs - Throttle position sensor - All ignition/spark plug leads - Hose clamps - Some older hoses (vacuum lines, fuel lines & coolant lines)
I'm unsure at the moment as to what I can do to fix my vehicle and I am very interested in finding a permanent solution to this problem. I cannot take this vehicle to a mechanic as I would have to navigate heavy traffic with a car that stalls every 47 seconds.
Any help and advice would be most greatly appreciated.
Thank you for reading!
Kind Regards, Kail M.
Edit: ECU displaying error code 31 (Load Signal Circuit) and 23 (Throttle Valve switch). Any help is greatly appreciated