Fuel System Inspection
- Check the fuel for excessive water, alcohol, or other contaminants. Replace contaminated fuel as necessary.
- Install a fuel pressure gage.
- Inspect fuel pressure with engine idling at normal operating temperature.
Specification : 338~348kPa (3.45~3.55kg/cm2 )
- Is fuel pressure within the specified value?
YES
- Go to "FUEL INJECTOR INSPECTION " procedure as below.
NO
- Repair as necessary refer to inspection note as below and go to "VERIFICATION OF VEHICLE REPAIR " procedure.NOTE:
- Check if fuel line pressure decreases when accelerating quickly.
- If it does, check fuel pump maximum pressure. If pressure is OK, check fuel line and filter for clogging.
- If fuel pressure is lower than specification : Check for fuel line pressure while pinching fuel return hose.
- If pressure quickly increases, check pressure regulator.
- If pressure gradually increases, check for clogging between fuel pump and pressure regulator. If hose is not clogged, check fuel pump maximum pressure.
- If fuel pressure is higher than specification : Is fuel line clogged?
- If it is not, replace pressure regulator.
- If it is, replace it.
- Check if fuel line pressure decreases when accelerating quickly.