Nissan Repair: 86 automatic 300zx na to 86 turbo motor and 5sp, oil pressure switch, nissan 300zx

Question
86 Nissan 300zx Turbo. I Took A 86 300zx Na And Put A Turbo Motor And 5sp In My Na Car. Switched Ecu And Engine Harness. Car Starts But Only Runs For About A Minute. Ecu Keeps Shutting Down Fuel Injectors. Engine Ran Well Before Swap. Double Checked All Wiring And Far As I Can See All Seems To Be Fine So Far

Answer
Keith,

Check the oil pressure switch harness and switch to make sure it is working since that is what Nissan uses to turn off the injectors in the event there is no oil pressure as in a wreck or a blown oil pump.  Other options are to wire around the problem to provide signal to the ECU that the oil pressure is detected.