Where is the fuel screw on a 5.9l cummins turbo diesel?
The fuel screw on a 5.9L Cummins turbo diesel is located on top of the fuel injection pump near the front of the engine. It is held in place with two bolts and an O-ring seal. The fuel screw controls the amount of fuel that is delivered to the engine. Turning the screw in will decrease the amount of fuel that is delivered, while turning the screw out will increase the amount of fuel that is delivered.