Question 39Motor Plants - QMED

The correct answer is A) injection pump fuel rack binding or sticking. Diesel engine surging can be caused by an issue with the fuel injection system, specifically the fuel injection pump. If the fuel rack, which controls the amount of fuel injected, becomes stuck or binds, it can cause uneven fuel delivery to the engine cylinders, leading to the engine surging. This is a common cause of diesel engine surging. The other options are incorrect because low compression (B) would not directly cause surging, a stuck open solenoid (C) would not affect the fuel injection pump, and high fuel booster pump pressure (D) would not be a direct cause of surging.