USING THE PC III USB BUTTONS
You can quickly adjust your fuel settings beyond what is stored in your fuel map
through using the buttons on the faceplate of your PCIII USB. Each button controls a
range of rpm values. The button ranges are determined by taking the rpm range for
your vehicle and dividing it into thirds. The buttons adjust fuel for all throttle
positions within the specified rpm range.
low button—from 0 to the bottom third of the rpm range.
mid button—the middle third of the rpm range.
high button—the upper third of the rpm range.
USING BUTTON MODE TO INCREASE OR DECREASE FUEL
To use button mode:
1 Depress all three buttons (low, mid, and high) on the PCIII USB front panel
simultaneously while powering up.
The middle two LEDs will light showing that the PCIII USB is set to button mode
with zero fuel adjustment.
2 Press the low button once to add more fuel when your vehicle is operating in the
low range.
The LED above the zero position in the positive (+ fuel) direction will light
showing more fuel is being added.
3 Press the button again to add additional fuel in that range.
4 Hold the button (low, mid, or high) down steadily to decrease the amount of fuel.
You will see the LEDs light in the negative (- fuel) direction indicating that fuel is
decreased.
5 Repeat the steps for each button.
