Condition | Possible Cause | Action |
---|---|---|
Hard starting (Engine cranks OK)
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Faulty ignition coil
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Faulty CMP sensing rotor or CKP sensing rotor
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Faulty idle air control system
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Faulty ECT sensor, TP sensor, CKP sensor, CMP sensor or MAP sensor
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Fuel pressure out of specification
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Faulty fuel injector
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Faulty ECM
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Malfunctioning PCV system
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Low compression
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Improper valve lash
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Improper valve timing
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Compression leak from valve seat
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Sticky valve stem
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Weak or damaged valve springs
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Compression leak at cylinder head gasket
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Sticking or damaged piston ring
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Worn piston, ring or cylinder
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