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


Restricted exhaust - Check Catalytic Converter system, Catalytic Converter


Poor or contaminated fuel - Recommend higher grade fuel