TECH TIPS

LESS THAN PERFECT

Whether civilian-owned or in actual military service, many HMMWVs don’t have the right fuel-injection pump installed, and/or the fuel-rate calibration is incorrect. This results in either over-fueling, which wastes fuel, produces black smoke, and is detrimental to proper engine lubrication, or under-fueling, which results in lack of power.

Proper fuel delivery, either with the correct pump and/or the right calibration, is determined by the amount of equipment loaded onto the vehicle, and/or the type of variant. Installing the correct pump with the proper calibration is especially important for our hobby’s HMMWV owners who often re-configure a vehicle.

Simply put,