Hard starting (Engine can be cranked)
Precautions: General safety (00)
Perform troubleshooting referring to the following points when ECM has detected no DTC and no abnormality has been found in Visual Inspection:M16A and Engine Basic Inspection:M16A.
| Condition | Possible Cause | Action |
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Hard starting (Engine can be cranked)
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Faulty spark plug
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Faulty ignition coil
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Dirty or clogged fuel hoses or pipes
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Malfunctioning fuel pump
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Air drawn in through intake manifold gasket or throttle body gasket
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Check air intake system.
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Faulty electric throttle body assembly
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Faulty APP sensor
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Faulty ECT sensor or MAP sensor
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Faulty ECM
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Low compression
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Poor spark plug tightening or faulty gasket
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Compression leakage from valve seat
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Sticky valve stem
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Weak or damaged valve springs
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Compression leakage at cylinder head gasket
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Sticky or damaged piston ring
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Worn piston, piston ring or cylinder
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Malfunctioning PCV valve
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VVT system out of order
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•VVT actuator: VVT Actuator, Camshaft, Tappet and Shim Inspection:M16A
•Valve timing: Timing Chain and Chain Tensioner Inspection:M16A •OCV oil circuit: Timing Chain Cover Inspection:M16A |