Excessive Emissions/Fuel Consumption

POOR FUEL ECONOMY
^ Air Mass Meter
^ Coolant Temperature Sensor
^ Shorted Oxygen Sensor Probe
^ Fuel Pressure Regulator

ENGINE RUNS TOO RICH
^ Air Mass Meter
^ Coolant Temperature Sensor
^ Shorted Oxygen Sensor Probe
^ Fuel Pressure Regulator


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