Poor Fuel Economy
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Poor Fuel Economy
| Concern |
Causes |
| DEFINITION: Difficulty when refueling the vehicle. |
| Difficult to fill |
- The fuel filler pipe check valve is stuck closed.
- The fill limiter vent valve (FLVV) is stuck closed.
- Any restricted vapor lines or hoses
- The EVAP canister is restricted.
- A fuel with high reid vapor pressure characteristics.
- A high fuel temperature
- The fuel filler hose/pipe is pinched, kinked, or blocked.
|
| Over fill |
- The pressure relief valve in the fill limiter vent valve (FLVV) is stuck open.
- The pressure relief valve in the FLVV is leaking.
- The FLVV is stuck open.
- The FLVV is leaking.
|
| Pre-mature shut-off of the fuel dispensing nozzle |
- The fill limiter vent valve (FLVV) is stuck closed.
- Any restricted vapor lines or hoses
- The EVAP canister is restricted.
- A fuel with high reid vapor pressure characteristics
- A high fuel temperature
|
| Fuel spitback |
- The fuel filler pipe check valve is stuck open.
- The filler pipe check valve is stuck closed.
- The filler pipe check valve is leaking.
- A fuel with high reid vapor pressure characteristics.
- A high fuel temperature
|
| Liquid fuel in the EVAP canister |
- The fill limiter vent valve is stuck open.
- The fill limiter vent valve is leaking.
|
| Liquid fuel leak |
- The pressure relief valve in the fill limiter vent valve (FLVV) is stuck open.
- The pressure relief valve in the FLVV is leaking.
- The fuel filler hose is loose or torn.
- The FLVV is stuck open.
|
| Fuel odor |
- The pressure relief valve in the fuel limiter vent valve (FLVV) is stuck open.
- The pressure relief valve in the FLVV is leaking.
- The EVAP canister is saturated with fuel.
|