Calibration Resistors for Chevrolet 6.5 DS Fuel Injection Pumps

Injection pump fuel delivery is calibrated with a resistor in the Chevrolet DS fuel injection pump. Resistors are available from one to nine. The number nine will deliver the highest fuel delivery. If no resistor is used, the pump will default to the number five. It is recommended using the number nine resistor for extra performance.

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