In one exemplary embodiment, a toy track set for at least one toy vehicle is provided, the toy track set having: a track path; and a surface rotatably mounted to a base, wherein a portion of the surface comprises a portion of the track path and wherein as the surface rotates and spins on the base to transfer the toy vehicle from a first portion of the track to a second portion of the track. In particular, the idle speed control strategy involves using a combination of fuel quantity or timing and ignition timing to achieve desired engine speed or torque while maintaining the airfuel ratio more lean than prior art systems. An adjustable height post is mounted on a base that includes a ramp to be placed under a vehicle wheel by driving the vehicle upon the base. The processor will lock-out further burner operation after a predetermined number of consecutive shut downs occurs, and will communicate any malfunction information to a remote display device. The inverting converters generate a check current to check a connection state of an inductor when the inductor is connected.