2.
Is there a problem?
YES
a.
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
a.
Go to "Check for Exhaust Leak" as below.
Check the following items for leak:
- Throttle body gasket
- Gasket between intake manifold and surge tank
- Seals between intake manifold and fuel injectors
- Seals between surge tank and PCV valves
Is there a problem?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Go to "Check for Exhaust Leak" as below.
Check for leak in Exhaust.
Is there a problem?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
Go to "Check Fuel Line Pressure" as below.
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.
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 ~ 350kPa (3.26~ 3.57kg/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 ~ 280kPa (2.55 ~ 2.86kg/cm², 36.3~40.6 psi)
Is the fuel pressure OK?
YES
Go to "Component Inspection" procedure.
NO
If fuel pressure is too low, check fuel filter for blockage or fuel pump.
If fuel pressure is too high, check fuel pump.
Go to "Verification of Vehicle Repair" procedure.
