I finally found what was causing my nsx not to start sometime. After 4 hrs of seaching what was with the car, It was the little Plug next to the starter that was loose. I snapped it back in, and the car started right up but now I have another problem. While driving, and letting off the gas and clutch and putting the car to neutral, the RPM drop all the way to zero and car shuts off. I have already replace the main relay in the back next to the ecu and the ignition switch last week. I ck all the wires and battery terminal to make sure everything is tight. The battery is brand new. My car is a 2000 with 59000 miles. Can someone shine in on this problem. I'm tired of finding problem after problem with the car not starting and losing power while driving.