Owners of cars with diesel engine certainly discovered on many occasions how important it is to have a functional and smoothly operating fuel system. Even though the injection pump is an extremely durable and reliable element, in an older car you can often notice the impact of time on this component. As a result, you will soon feel a drop in engine power and experience problems with ignition. Such symptoms leave no doubt as to the fact that one of the main suspect will be the defective injection pump.