I have a 92 3000GT SL and the computer is in some kind of lockout mode and won't communicate with anything. It runs and idles about 2500 rpms and the electric fans don't kick on anymore. Anyone got an idea? Guessing i need another ECU but let me know.

 

Check the powers and ground to the ecu and if they are ok replace the ecu. When I replaced my ecu it wasnt communicating, after I replaced it my car was fine.