Poor Fuel Economy

Symptom: 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


Fuel Injection system malfunction Check air/fuel ratio,
Refer to Computers and Control Systems,
Check fuel pressure,
(check vacuum line and return hose)


Speedometer inaccurate Check speedometer calibration


Fuel leak Inspect fuel lines, tank
and fittings