Poor Fuel Economy: Troubleshooting
WARNING: This page is about a different car, the 2006 Suzuki Reno and 2006 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
TROUBLESHOOTING CHART
| Step |
Action |
Value(s) |
Yes |
No |
| 1 |
Were the Important Preliminary Checks performed? |
- |
Go to Step 2 |
Go to "IMPORTANT PRELIMINARY CHECKS " |
| 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.
- Inspect the ignition wires for cracking, hardness, and proper connections.
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 the Torque Converter Clutch (TCC) operation with a scan tool. The scan tool should indicate RPM drop when the TCC is commanded ON.
- 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 |
- |