Inspection Procedure

■ Inspect whether to leak air or stuck

1. Inspect a contamination, gasket and installation.

• Damaged or installation of throttle body
• Damaged or installation of intake manifold and gasket which is installed in surge tank
• Contamination and stuck in intake manifold
• Contamination between surge tank and PCSV and stuck open
• Damaged or contamination of HO2S (UP)
• Visual check leak a catalyst and a exhaust system of HO2S (Down)

■ Inspection sensor

1. Check a installation of HO2S, connector connection, damaged wire and ECM.
2. Check a HO2S silicon contamination that check whether it is to dredge the sensor with white flour. Also, an data would be abnormal.
3. Check a HO2S contamination (Flowing in fuel, coolant or engine oil)
4. Check a intake air flow sensor contamination or poor performance, connection and wiring.
5. Start a engine and check that both throttle position sensor and pedal sensor data would be increased.
6. Check a ECM ground.

■ Inspection of fuel line

1. Check whether a fuel filter would be stuck or not.
2. Check a fuel level.
3. Check whether leak a low pressure fuel or it is stuck.
4. Measure a fuel pressure in idle after installing a fuel pressure measurement gauge.

• Specification:  Fuel Pressure - 480 - 520 kPa (4.9 - 5.3 kgf/cm² , 69.6 - 75.4 psi)

■ Inspection of injector

1. Measure a resistance injector

• MPI injector specification:  Approx. 11.4 - 12.6Ω (20°C (68°F))
• GDI injector specification:  Approx. 1.74 - 1.92Ω (20°C (68°F))

Good 

• Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
• Repair or replace as necessary and then Go to "VERIFICATION OF REPAIR " procedure.

No Good 

• Repair or replace as necessary and then, Go to "VERIFICATION OF REPAIR " procedure.