When your Ford Engine Control Module ECM, Ford ECU are maintained perfectly, the experience of driving the car goes up manifolds. However, when the Ford ECM or Ford ECU are not of standard quality or have seen enough wear and tear owing to extended usage, it is bound to reflect in the driving. Hence it is advisable that your vehicle goes for regular check up to Auto Module Source. If the AMS technician or mechanic asks you to go for Ford ECU replacement, go for it!