Swirl control valve solenoid?

DTC P1130: SWIRL CONTROL VALVE CONTROL SOLENOID VALVE
NOTE:
If DTC P1165 is also present, perform diagnosis for DTC P1165 first.

Description
This engine control system has a swirl control valve in the intake passage of each cylinder. When idling, and during low engine speed operation, swirl control valve close and velocity of air in intake passage increases, promoting vaporization of fuel and producing a swirl in combustion chamber. Because of this operation, this system tends to increase burning speed of the gas mixture, improve fuel consumption, and increase stability in running conditions. Except when idling and during low engine speed operation, this system opens swirl control valve. In this condition, this system tends to increase power by improving intake efficiency via reduction of intake flow resistance by increasing intake flow. The solenoid valve controls swirl control valve's open/closed condition. Swirl control solenoid valve is operated by the ECM.

Possible Causes
ECM illuminates MIL and sets DTC P1130, when improper voltage or vacuum signal is sent to ECM. Three malfunctions are possible, they are as follows:

Malfunction "A"

DTC sets when an improper voltage signal is sent to ECM through swirl control valve control solenoid valve. Possible causes are as follows:

†Swirl control valve control solenoid valve is open or shorted.
†Poor, loose, corroded or damaged terminal connections.
†Defective swirl control valve control solenoid valve.

Malfunction "B"

DTC sets when the vacuum signal is not sent to swirl control valve under specified driving conditions, even though swirl control valve control solenoid valve is On. Possible causes are as follows:

†Swirl control valve control solenoid valve is open or shorted.
†Poor, loose, corroded or damaged terminal connections.
†Intake air leaks.
†Defective vacuum hoses and tubs between intake manifold, vacuum tank and swirl control valve actuator.
†Defective swirl control valve actuator.
†Defective swirl control valve control vacuum check switch.
†Defective MAF sensor.
†Defective CKP sensor (REF).
†Defective TP sensor.

Malfunction "C"

DTC sets when the vacuum signal is sent to swirl control valve even though swirl control solenoid valve is Off. Possible causes are as follows:

†Swirl control valve control solenoid valve is open or shorted.
†Poor, loose, corroded or damaged terminal connections.
†Defective vacuum hoses and tubs between intake manifold, vacuum tank and swirl control valve actuator.
†Defective swirl control valve actuator.
†Defective swirl control valve control vacuum check switch.
†Defective CKP sensor (REF).
†Defective TP sensor.

As to the random and multiple misfiring, get the spark plugs, ignition coil and fuel injectors checked.

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