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