Routine 213-Poor Fuel Economy

DIAGNOSTIC ROUTINE 213-POOR FUEL ECONOMY

System & Component(s)	Reference
VACUUM DISTRIBUTION Vacuum Leaks	Visual and audible inspection.
IGNITION Scope engine for: Spark Plugs, Coil, Module, Secondary Wires, Distributor Cap and Rotor Base Timing Plus Advance and Retard Functions	See BASIC TESTING article.
ITAKE AIR CONTROL Air Cleaner & Duct VAF Meter	Perform a visual inspection.
FUEL DELIVERY Pump Pressure Regulator Return Line (Restricted) Injectors	Perform fuel pressure test. See I - SYS/COMP TESTS article.
EEC Quick Test	See TESTS W/CODES article.
EGR (2.2L) Valve Solenoids	See I - SYS/COMP TESTS article.
COOLING Thermostat	Check cooling system.
FACTORS EXTERNAL TO THE ENGINE Tire Pressure Transaxle (Slipping) Brakes (Dragging) Exhaust (Restricted) Vehicle Load Road and Weather Conditions Driving Habits Odometer Calibration	Perform a manual and visual inspection.
BASIC ENGINE Compression Check Camshaft Intake Manifold Gasket	Check engine mechanical condition.