Improper engine idling or engine fails to idle
Perform troubleshooting referring to the followings when ECM has detected no DTC and no abnormality has been found in Visual Inspection:M13A with VVT and Engine Basic Inspection:M13A with VVT .
Condition Possible Cause Action
Improper engine idling or engine fails to idle
Faulty spark plug
Leaky or disconnected high-tension cord
Faulty ignition coil with ignitor
Fuel pressure out of specification
Leaky manifold, throttle body, or cylinder head gasket
Malfunctioning EGR valve
Faulty idle air control system
Faulty evaporative emission control system
Faulty EGR system
Faulty fuel injector(s)
Poor performance of ECT sensor, TP sensor or MAF sensor
Faulty ECM
Loose connection or disconnection of vacuum hoses
Malfunctioning PCV valve
Engine overheating
“Overheating” under Engine Symptom Diagnosis:M13A with VVT
Low compression
Camshaft position control (VVT) system out of order