Condition | Possible Cause | Action |
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Poor gasoline mileage
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Leaks or loose connection of high-tension cord
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Faulty spark plug (improper gap, heavy deposits and burned electrodes, etc.)
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Malfunctioning EGR valve
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High idle speed
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“Improper Engine Idling or Engine Fails to Idle” under
Engine Symptom Diagnosis:M13A with VVT
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Poor performance of TP sensor, ECT sensor or MAF sensor
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Faulty fuel injector(s)
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Faulty ECM
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Low Compression
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“Low Compression” under
Engine Symptom Diagnosis:M13A with VVT
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Poor valve seating
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Dragging brakes
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Slipping clutch
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Thermostat out of order
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Improper tire pressure
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“Replacement Tires” under
Tires Description
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Camshaft position control (VVT) system out of order
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