Check Fuel Line Pressure
- Start the engine with the fuel pump disconnected to reduce the internal pressure of the fuel lines and hoses, and wait until the engine stalls before continuing.CAUTION: Be sure to reduce the fuel pressure before disconnecting the fuel main pipe and hose, otherwise fuel may spray out, possibly resulting in fire or injury.
- Disconnect the battery negative (-) terminal and then connect the fuel pump harness connector.
- Install the fuel pressure gauge using the appropriate adapter.
- Connect the battery's negative (-) terminal.
- Check that there is no fuel leak from the pressure gauge or connections.
- Disconnect the vacuum hose from the pressure regulator and plug the hose end. Measure the fuel pressure at idle.
- Specification: 320 ~ 350 kPa (3.26~ 3.57 kg/cm2 , 46.4~50.7 psi)
- Measure the fuel pressure when the vacuum hose is connected to the pressure regulator (while engine is running).
- Specification: 250 ~ 280 kPa (2.55 ~ 2.86 kg/cm2 , 36.3~40.6 psi)
- Is the fuel pressure within specifications?
YES
- Go to "COMPONENT INSPECTION " procedure.
NO
- If fuel pressure is too low, check for restrictions in the fuel lines or fuel filter.
- If fuel pressure is too high, check the fuel pressure regulator.
- If no concerns are found with the fuel lines, filter, or pressure regulator, check the operation of the fuel pump assembly.