The Gizzmo CamFC has an AFC (air/fuel controller) onboard so that fundamental fueling issues related to the addition of tuning accessories such as extractors, exhausts, adjustable cam gears, filters and mild cams can be resolved. The cam switching point is adjustable in 1 RPM increments and the switch off point is adjustable as well. The AFC is adjustable in 500RPM increments and the switch off point is adjustable as well. The AFC is adjustable in 500RPM increments and automatically interpolates (averages) between these points. For non-adjustable cam vehicles, the CamFC can be used to its AFC and tachometer features while the cam trigger output can be used as an RPM switch for NOS, shiftlight, high boost solenoid, etc.