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General Diagnostic Table: Inspection: Engine

NOTE: Malfunction of parts other than those listed is also possible. < Ref. to ENGINE TROUBLE IN GENERAL . >
DIAGNOSTIC PROCEDURE

Symptom Problem parts
1. Engine stalls during idling.
  1. Electric throttle
  2. Manifold absolute pressure sensor
  3. Mass air flow and intake temperature sensor
  4. Ignition parts ((1))
  5. Engine coolant temperature sensor ((2))
  6. Crankshaft position sensor ((3))
  7. Camshaft position sensor ((3))
  8. Fuel injection parts ((4))
2. Rough idling
  1. Electric throttle
  2. Manifold absolute pressure sensor
  3. Mass air flow and intake temperature sensor
  4. Engine coolant temperature sensor ((2))
  5. Ignition parts ((1))
  6. Air intake system ((5))
  7. Fuel injection parts ((4))
  8. Crankshaft position sensor ((3))
  9. Camshaft position sensor ((3))
  10. Oxygen sensor
  11. Fuel pump and fuel pump relay
3. Engine does not return to idle.
  1. Electric throttle
  2. Engine coolant temperature sensor
  3. Manifold absolute pressure sensor
  4. Mass air flow sensor
4. Poor acceleration
  1. Manifold absolute pressure sensor
  2. Mass air flow and intake temperature sensor
  3. Electric throttle
  4. Fuel injection parts ((4))
  5. Fuel pump and fuel pump relay
  6. Engine coolant temperature sensor ((2))
  7. Crankshaft position sensor ((3))
  8. Camshaft position sensor ((3))
  9. A/C switch and A/C cut relay
  10. Engine torque control signal circuit
  11. Ignition parts ((1))
5. Engine stalls or engine sags or hesitates at acceleration.
  1. Manifold absolute pressure sensor
  2. Mass air flow and intake temperature sensor
  3. Engine coolant temperature sensor ((2))
  4. Crankshaft position sensor ((3))
  5. Camshaft position sensor ((3))
  6. Purge control solenoid valve
  7. Fuel injection parts ((4))
  8. Fuel pump and fuel pump relay
6. Surge
  1. Manifold absolute pressure sensor
  2. Mass air flow and intake temperature sensor
  3. Engine coolant temperature sensor ((2))
  4. Crankshaft position sensor ((3))
  5. Camshaft position sensor ((3))
  6. Fuel injection parts ((4))
  7. Throttle position sensor
  8. Fuel pump and fuel pump relay
7. Spark knock
  1. Manifold absolute pressure sensor
  2. Mass air flow and intake temperature sensor
  3. Engine coolant temperature sensor
  4. Knock sensor
  5. Fuel injection parts ((4))
  6. Fuel pump and fuel pump relay
8. After-burning in exhaust system
  1. Manifold absolute pressure sensor
  2. Mass air flow and intake temperature sensor
  3. Engine coolant temperature sensor ((2))
  4. Fuel injection parts ((4))
  5. Fuel pump and fuel pump relay
(1) Check ignition coil & ignitor ASSY and spark plug.
(2) Indicate the symptom occurring only in cold temperatures.
(3) Ensure the secure installation.
(4) Check fuel injector, fuel pressure regulator and fuel filter.
(5) Inspect air leak in air intake system.

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