PMD / FSD Calibration Resistor
Fine-tune your fuel ratio.
Match your old resistor to calibrate the PMD / FSD to the injector pump.
If you don't know your current resistor value, the #5 resistor is recommended and will work satisfactorily with all injector pumps. The #9 resistor supplies a very small amount of additional fuel, which may improve engine performance.
Currently, only the #5 and #9 resistors are available. Select the number closest to your original value.