Engine does not crank (Does not start)
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Battery
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Starter signal circuit
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VC output circuit (ECM 5 V output)
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No initial combustion (Does not start)
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ECM power source circuit
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VC output circuit (ECM 5 V output)
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Crankshaft position sensor
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Fuel pump control circuit
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Ignition system
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Fuel injector circuit
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Valve timing (check for loose or jumped teeth on timing chain)
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No. 1 valve rocker arm sub-assembly*
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Engine cranks normally but difficult to start
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Fuel pump control circuit
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Fuel pump
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Engine coolant temperature sensor
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Ignition system
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Fuel injector assembly
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Compression
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Fuel injector circuit
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ECM power source circuit
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Intake system
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Throttle body assembly
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No. 1 valve rocker arm sub-assembly*
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Incomplete intermittent combustion occurs (Does not start)
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Fuel pump control circuit
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Fuel pump
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Fuel line
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-
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Ignition system
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Fuel injector assembly
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Crankshaft position sensor
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Valve timing (check for loose or jumped teeth on timing chain)
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High engine speed (Poor idle)
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Air conditioning signal circuit
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Throttle body assembly
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Intake system
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Engine coolant temperature sensor
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ECM power source circuit
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PCV hose
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PCV valve
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Low engine speed (Poor idle)
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Fuel pump control circuit
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Throttle body assembly
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Intake system
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PCV hose
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PCV valve
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Engine stalls on deceleration
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Idle speed (refer to "Low engine speed" symptom)
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Rough idle
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Compression
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Air fuel ratio sensor
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Heated oxygen sensor
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Mass air flow meter sub-assembly
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Ignition system
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Fuel line
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-
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Fuel pump
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Intake system
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PCV hose
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PCV valve
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No. 1 valve rocker arm sub-assembly*
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External part malfunction (Increase in load: A/C system, A/T system, etc.)
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-
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Hunting (Poor idle)
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PCV hose
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PCV valve
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Mass air flow meter sub-assembly
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Air fuel ratio sensor
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Engine stalls during air conditioning operation
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Air conditioning signal circuit
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ECM
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Hesitation/Poor acceleration (Poor driveability)
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Fuel line
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-
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Fuel pump
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Valve timing (check for loose or jumped teeth on timing chain)
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Mass air flow meter sub-assembly
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Throttle body assembly
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Knock control sensor
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Fuel injector assembly
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Ignition system
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Compression
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Brake override system
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No. 1 valve rocker arm sub-assembly*
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Surging (Poor driveability)
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Fuel line
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-
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Fuel pump control circuit
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Fuel pump
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Ignition system
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Fuel injector assembly
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No. 1 valve rocker arm sub-assembly*
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Engine stalls soon after starting
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Mass air flow meter sub-assembly
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Intake system
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Fuel line
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-
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Valve timing (check for loose or jumped teeth on timing chain)
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No. 1 valve rocker arm sub-assembly*
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