Hard starting (Engine cranks OK)
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
Hard starting (Engine cranks OK)
Faulty spark plug
Leaky high-tension cord
Loose connection or disconnection of high tension cords or lead wires
Faulty ignition coil
Dirty or clogged fuel hose or pipe
Malfunctioning fuel pump
Air inhaling from intake manifold gasket or throttle body gasket
Faulty idle air control system
Faulty ECT sensor or MAF sensor
Faulty ECM
Low compression
Poor spark plug tightening or faulty gasket
Compression leak from valve seat
Sticky valve stem
Weak or damaged valve springs
Compression leak at cylinder head gasket
Sticking or damaged piston ring
Worn piston, ring or cylinder
Malfunctioning PCV valve
Camshaft position control (VVT) system out of order
Faulty EGR system