Electronic Control System Signature, ISX and QSX15 Engines – 019-110   Fueling Actuator

The fueling actuators control the delivery of fuel to the engine. They are a part of the fuel delivery housing, located on the left side of the engine in front of the ECM. There are two fueling actuators, one front and one rear.

The front fueling actuator is located on the fuel delivery housing. It is the actuator closest to the front of the engine.

The rear fueling actuator is located on the fuel delivery housing. It is the actuator closest to the rear of the engine.

Perform e INSITE™ electronic service tool Cylinder Performance Test to determine if an actuator has failed. If a bank fails, this could indicate an actuator failure.

If only two injectors in a bank fail, repeat the test. Swap the front and rear fueling actuators to determine if the failed bank of cylinders follows the actuator. If so, replace the failed fueling actuator as necessary.

If not, swap the front and rear timing actuators to determine if the failed bank of cylinders follows the actuator. If so, replace the the failed timing actuator as necessary.

In the illustration, the front fueling actuator is at the lower left and the rear fueling actuator is at the upper right.

Clean the area around the fueling actuator.

Disconnect the fueling actuator connector from the engine harness.

Remove the three capscrews securing the fueling actuator.

In the illustration, the front fueling actuator is at the lower left and the rear fueling actuator is at the upper right.

Install a new o-ring. Apply grease to the o-ring groove to retain the o-ring during installation.

Install the three capscrews securing the new fueling actuator to the fuel housing.

Connect the engine harness to the fueling actuator. Start the engine and check for leaks.