Air clog check
Check "Air intake system"
▶ Check clog of air-cleaner.
▶ Check deterioration or contamination on throttle body and gasket.
▶ Check contamination, damage, stuck or clog on intake manifold, PCSV, ISCA and injectors.
Is there any problem?
YES
Repair as necessary and go to "Verification of vehicle Repair" procedure
NO
Go to "Fuel pressure check" procedure.
Fuel pressure check
Key "OFF".
Disconnect a fuel pump relay.
Engine start and wait until engine stop. and then key "OFF".
Connect a fuel pump relay.
Connect a fuel pressure guage to a fuel filter by a fuel pressure guage adaptor.
Engine start and measure a fuel pressure.
Specification : Approx. 3.5㎏/㎠
Is the fuel pressure normal?
YES
Go to "Component inspection" procedure.
NO
Check clog of the valve in a fuel pressure regulator.(If it has a problem, fuel happen to be leaked to a return line.)
Check the supply pressure of fuel pump.
Repair as necessary and go to "Verification of vehicle Repair" procedure
