Poor Fuel Economy

Definition: Fuel economy, as measured by an actual road test, is noticeably lower than expected. Also, economy is noticeably lower than it was on this car at one time, as previously shown by an actual road test.

POSSIBLE CAUSE ACTION

Dirty air filter Clean or replace

Rich air/fuel ratio Check air/fuel ratio,
Refer to COMPUTERIZED ENGINE CONTROLS,

Incorrect fuel pressure See FUEL PUMP AND PRESSURE REGULATOR (SYSTEM PRESSURE CHECKS) under COMPONENT TESTING

Speedometer inaccurate Check speedometer calibration

Fuel leak Inspect fuel lines, tank
and fittings