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