Inspections
| Action
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DEFINITION: Fuel economy, as measured by an actual road test, is noticeably lower than expected.
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Preliminary
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• | Inspect the air cleaner element, or the filter, for dirt or being plugged. |
• | Visually and physically inspect the vacuum hoses for splits, kinks, and proper connections as shown on the Vehicle Emission Control Information label. |
• | Discuss the driving habits with the owner for the following items: |
- | The A/C is ON full time, or the defroster mode is ON |
- | The tires for being at the correct air pressure |
- | The wheel and tires are the correct size |
- | Excessively heavy loads being carried |
- | Aggressive driving habits |
• | Suggest to the owner to fill the fuel tank and to inspect the fuel economy. |
• | Suggest to the driver to refer to Important Facts on Fuel Economy in the owner manual. |
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Fuel System
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Ignition System
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• | Inspect the spark plugs. Remove the spark plugs and check for the following: |
• | Inspect for an open ignition control (IC) circuit. |
• | Inspect the knock sensor (KS) system operation. |
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Cooling System
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• | Inspect the engine coolant level. |
• | Inspect the engine thermostat for always being open or for the wrong heat range. |
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Additional
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• | Inspect for proper calibration of the speedometer. |
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