Check contamination, clog and installation of gasket.

▶ Any damage or installation of throttle body gasket.

▶ Any damage or installation of gasket between intake manifold and surge tank.

▶ Clog or contamination of intake manifold and injector by foreign materials.

▶ Contamination and open stuck between surge tank and PCSV by foreign materials.

▶ Any damage or contamination of HO2S(S1) by foreign materials.

Has a problem been found ?

	▶ Go to " Check Fuel Line" as follows.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

Check Clog, contamination and installation of Fuel Line as follows.

▶ Connection for each connectors in Fuel Line.

▶ Damage, interference and installation of vaccum hose connected to Fuel Line.

▶ Bend, Leakage and squeeze of pipe in Fuel Line.

	▶ Go to "Check Fuel Pressure" as follows.
	▶ Repair or replace as necessary and then, go to "Verification of Vehicle Repair" procedure.

IG KEY "OFF".

Disconnect fuel pump relay from junction box in passenger compartment.

Start engine and await until engine is off and then, IG "OFF"

Connect fuel pump relay again.

Connect fuel pressure gauge on the fuel filter with fuel pressure gauge adaptor.

Start engine again and measure fuel pressure.

Is the fuel pressue normal ?

	▶ Go to "Component Inspection" procedure.
	▶ Check any damage of fuel return hose or pipe. ▶ Check any stuck of the valve in the fuel pressure regulator. ▶ Repair or replace as necessary and then, go to 'Verification of Vehicle Repair" procedure.