System Inspection

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Warm engine to normal operating temperature. Run engine at idle. Verify swirl control valve actuator rod is retracted into swirl control valve at idle. See Figure . Gradually increase engine speed and verify rod extends at speeds greater than 4000 RPM. If necessary, check following components listed under this heading:

Electrical Signal
Solenoid Valve
Swirl Control Valve Actuator
Swirl Control Valve Actuator Arm
Vacuum Signal