Engine Performance problem
1998 Other Mercedes Benz Models 4 cyl Front Wheel Drive Automatic 272000 miles
The EPC light on the dashboard is persistently on and the car revolution dpse not get beyond 3000rev./Min. Consequently the car speed has not exceeded 80km/hr. The two fuel pumps have been checked also the CDI rail sensor switch was changed the problem persists. What is the most likely cause of the fault. How do can it be fixed?