System Inspection

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 filer 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 to 520kPa (4.9 to 5.3kgf/cm² , 69.6 to 75.4psi)

□ Inspection of injector

1. Measure a resistance injector

• MPI injector specification:  Approx. 11.4 to 12.6Ω (20°C (68°F))
• GDI injector specification:  Approx. 1.425 to 1.575Ω (20°C (68°F))

□ Inspection of engine pressure

1. Engine coolant temperature could be became between 80 and 95°C (176°F and 203°F) after starting a engine and stop.
2. Disconnect an injector extension connector and an ignition coil connector.
3. Disconnect an ignition coil and an ignition plug.
4. Install a pressure gauge to ignition plug hole.
5. A throttle valve is full opened.
6. Measure a pressure after cranking at least 20 times.

• Normal Value: 

Specification: 13.0kgf/cm² (200 to 250rpm)

Limitation: 11.5kgf/cm²

Deviation each one cylinder pressure: Below 1.0kg/cm²

Good 

• Check for engine coolant loss. If there is a large loss of coolant, check the condition of the engine block, cylinder head or cylinder head gasket for 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.