Excessive Emissions/Fuel Consumption

POOR FUEL ECONOMY
^ Airflow Meter
^ Coolant Temperature Sensor
^ Fuel Pressure Regulator
^ Oxygen Sensor

ENGINE RUNS TOO RICH
^ Airflow Meter
^ Coolant Temperature Sensor
^ Fuel Pressure Regulator
^ Oxygen Sensor

ENGINE RUNS TOO LEAN
^ Intake Air Leak
^ Coolant Temperature Sensor
^ Airflow Meter Connections
^ Injection Ground Connections
^ Oxygen Sensor