Poor Fuel Economy

DEFINITION:

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

CAUTION: Driving habits affect fuel economy. Check the owner's driving habits by asking the following questions:

Is the A/C system (i.e. defroster mode) turned on all the time?
Are the tires at the correct air pressure?
Have excessively heavy loads been carried?
Does the driver accelerate too much and too often?

Suggest the driver read the section in the owner's manual about fuel economy.

POOR FUEL ECONOMY - DIAGNOSIS PROCEDURE

Step	Action	Value (s)	Yes	No
1	Were the Important Preliminary Checks performed?	-	Go to Step 2.	Go to Symptom Diagnosis .
2	Inspect the air filter for excessive contamination. Inspect for fuel system leaks. Are all needed checks complete?	-	Go to Step 3.	-
3	Inspect the spark plugs for excessive wear, insulation cracks, improper gap or heavy deposits. Replace any faulty spark plugs. Are all needed checks and repairs complete?	-	Go to Step 4.	-
4	Inspect the engine coolant level. Check the thermostat for being always open or for an incorrect heat range. Replace the thermostat as needed. Are all needed checks and repairs complete?	-	Go to Step 5.	-
5	Check the transaxle shift pattern. Ensure all transaxle gears are functioning. Check for proper calibration of the speedometer. Check the brakes for dragging. Check the cylinder compression. Repair, replace or adjust any components as needed. Are all checks and needed repairs complete?	-	System OK	-