Poor Fuel Economy

1. Perform thorough visual inspection as outlined in "Intermittent Condition Diagnosis".
2. Check for defective or improperly installed thermostat.
3. Perform "Diagnostic Circuit Check" as outlined.
4. Inspect air filter and replace as needed.
5. Inspect A/C compressor clutch control circuit.
6. Check TCC operation.
7. Check Ignition timing and ensure ignition system components are satisfactory.
8. Check exhaust system for restriction.