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- Damaged charger system/battery.
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- Malfunctioning or damaged ignition system.
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- Malfunctioning or damaged fuel system.
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- Damaged valve tappet (2.3L and 4.0L engine).
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- Damaged valve tappet guide or lash adjuster (3.0L engine).
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- Improper valve-to-valve seat contact.
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- Repair or replace valve or valve seat.
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- Malfunctioning or damaged fuel system.
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- Malfunctioning or damaged ignition system.
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- Damaged valve tappet (2.3L and 4.0L engine).
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- Damaged valve tappet guide or valve tappet (3.0L engine).
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- Weak or broken valve spring.
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- Carbon accumulation in combustion chamber.
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- Eliminate carbon buildup.
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- Excessive Oil Consumption
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- Malfunctioning PCV system.
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- Repair or replace the necessary components.
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- Worn valve stem or valve guide.
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- Improper drive belt tension.
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- Malfunction generator bearing.
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- Malfunctioning water pump bearing.
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- Malfunctioning or damaged cooling system.
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- Malfunctioning or damaged fuel system.
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- Damaged timing chain tensioner.
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- Excessive main bearing clearance.
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- Adjust clearance or replace crankshaft main bearing.
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- Seized or heat damaged crankshaft main bearing.
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- Excessive crankshaft end play.
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- Excessive connecting rod bearing clearance.
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- Replace connecting rod bearing or connecting rod.
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- Heat damaged connecting rod bearing.
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- Damaged connecting rod bushing.
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- Repair or replace cylinder block.
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- Worn piston or piston pin.
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- Malfunctioning valve tappet or lash adjuster.
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- Excessive valve tappet or lash adjuster clearance.
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- Excessive valve guide clearance.
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- Malfunctioning or damaged ignition system.
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- Malfunctioning or damaged fuel system.
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- Damaged or plugged exhaust system.
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- Malfunctioning valve tappet (2.3L and 4.0L engine).
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- Damaged valve tappet guide or valve tappet (3.0L engine).
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- Compression leakage at valve seat.
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- Weak or broken valve spring.
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- Cracked or distorted cylinder head.
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- Damaged, worn or sticking piston ring(s).
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- Repair or replace piston ring(s).
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