Lack of Power

Engine delivers less than expected power. Little or no increase in speed on slight acceleration.

POSSIBLE CAUSE ACTION


Spark timing - excessive retard ^ Check Spark Controls,


Lean Air-Fuel mixture ^ Check Air-Fuel ratio, O2 sensor, perform injector balance test, inspect regulator operation (check vacuum line and return hose), check fuel pressure


EGR malfunction ^ Check EGR system, Exhaust Gas Recirculation


Restricted exhaust ^ Check Catalytic Converter system, Catalytic Converter


Poor or contaminated fuel ^ Recommend higher grade fuel