1988 Mazda RX7 fuel cut in third gear at 3000 rpm?

The fuel cut in a 1988 Mazda RX-7 at 3000 RPM in third gear could be caused by several factors, including a malfunctioning throttle position sensor (TPS), issues with the fuel delivery system, or problems with the ignition system. It's also possible that the engine management system is triggering a safety limit due to a fault or sensor reading. Inspecting these components and checking for any error codes or vacuum leaks would be a good starting point for diagnosis.