There's a large dead-zone in the throttle pedal when I begin to depress it, in the Endurance Series’ cars. That is, the engine speed doesn’t’ begin to increase until I depressed the throttle pedal to about 15%. This problem makes it difficult to drive these cars in the pits, to start from crashes, and may affect drivability in other situations. I don’t have this problem with the 397’s cars or other third-party cars. Does anyone know how to fix this?