Excessive Emissions/Fuel Consumption

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

ENGINE RUNS TOO RICH
^ Coolant Temperature Sensor
^ Fuel Pressure Regulator
^ Oxygen Sensor
^ Vacuum Sensing Line To ECU

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