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Emissions Control System: Diagnosis Kia Sorento I facelift

Testing & Diagnostics 9 illustrations ~290 words

TROUBLESHOOTING

SymptomSuspect areaRemedy
Engine will not start or hard to startVacuum hose disconnected or damagedRepair or replace
Malfunction of the Purge Control Solenoid ValveRepair or replace
Rough idle or engine stallsVacuum hose disconnected or damagedRepair or replace
Malfunction of the PCV valveReplace
Malfunction of the evaporative emission canister purge systemCheck the system; if there is a problem, check related components parts
Excessive oil consumptionPositive crankcase ventilation line cloggedCheck positive crankcase ventilation system

TROUBLESHOOTING - SPECIFICATIONS

Scheme 5

Scheme 5: COMPONENT LOCATION
Scheme 5: COMPONENT LOCATION

Scheme 6

Scheme 6: SCHEMATIC DIAGRAM
Scheme 6: SCHEMATIC DIAGRAM

Scheme 7

Scheme 7: COMPONENTS
Scheme 7: COMPONENTS

INSPECTION

  1. Disconnect the ventilation hose from the positive crankcase ventilation (PCV) valve. Remove the PCV valve from the rocker cover and reconnect it to the ventilation hose.
  2. Run the engine at idle and put a finger on the open end of the PCV valve and make sure that intake manifold vacuum can be felt. NOTE: The plunger inside the PCV valve will move back and forth.

Scheme 8

Scheme 8: OPERATION
Scheme 8: OPERATION
  1. Disconnect the vacuum hose from the throttle body, and connect a vacuum pump to the vacuum hose.
  2. Check the following points when the engine is cold [engine coolant temperature 60°C (140°F) or below] and when it is warm [engine coolant temperature 80°C (176°F) or higher]. WHEN ENGINE IS COLD ENGINE OPERATION REFERENCE CHART Engine operating condition Applied vacuum Result Idling 50 kPa (7.3 psi) Vacuum is held 3,000 RPM WHEN ENGINE IS WARM ENGINE OPERATION REFERENCE CHART Engine operating condition Applied vacuum Result Idling 50 kPa (7.3 psi) Vacuum is held Within 3 minutes after engine start at 3,000 RPM Try to apply vacuum Vacuum is released After 3 minutes have passed after engine start at 3,000 RPM 50 kPa (7.3 psi) Vacuum will be held momentarily, after which, it will be released

Scheme 9

Scheme 9: REMOVAL
Scheme 9: REMOVAL

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12
  1. Disconnect the canister close valve connector (A).
  2. Remove the cover (A) and disconnect the vacuum hose (B).
  3. Disconnect the vacuum hoses (A, B).
  4. Unscrew the mounting nuts (A) and remove the canister assembly (B).

Scheme 13

Scheme 13: INSPECTION
Scheme 13: INSPECTION
  1. Look for loose connections, sharp bends or damage to the fuel vapor lines.
  2. Look for distortion, cracks or fuel damage.
  3. After removing the canister, inspect for cracks, damage or saturated canister.

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