For 1990-2009 cars

### Removal Procedure

1. Disconnect the electrical connector (1) from the intake resonance switchover solenoid.
2. Disconnect the vacuum hoses observing the proper positions.
3. Remove the screws that retain the solenoid.
4. Remove the solenoid from the pre-volume chamber.

### Installation Procedure

1. Install the solenoid on the pre-volume chamber.
2. Install and tighten the screws that retain the solenoid.
3. Connect the vacuum hoses in the correct positions.
4. Connect the electrical connector (1) to the switchover solenoid.