Component Inspection

Check for any split, disconnected or perforated vacuum hoses. Also, check PCV valve for proper operation.

1. Remove the positive crankcase ventilation valve.
2. Insert a thin stick into the positive crankcase ventilation valve from the threaded side to check that the plunger moves.
3. If the plunger does not move, the positive crankcase ventilation valve is clogged. Clean or replace it.
   Fig 1: Inserting Thin Stick Into Positive Crankcase Ventilation Valve From Threaded Side To Check That Plunger Moves

   Courtesy of HYUNDAI MOTOR CO.
4. Are vacuum hoses and PCV OK?

   YES 

   • Go to "Check for spark plug" below.

   NO 

   • Replace faulty vacuum hoses or PCV.
   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

Check the following items below for spark plug.

1. Remove spark plugs and check gap and plug condition.
2. Check the electrode condition (wear or carbon deposit)
3. Check the insulators condition (crack, etc.)
4. Check the carbon deposit

   Specification: gap: 1.0~1.1mm

5. Are spark plugs gapped properly and in good condition?

   YES 

   • Go to "Check for Fuel injector" below.

   NO 

   • Faulty spark plugs.
   • Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

1. Check for fuel injector operation.
2. Are fuel injectors working normal and dispensing proper volume?

   YES 

   • Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.