Intake Manifold Change-Over, Checking Function

Intake Manifold Change-over, Checking Function







- Remove front engine cover (arrows).
- Start engine and increase engine speed to well above 4200 rpm.







- The operating rods of the actuator for the intake manifold (arrow) must move

If the change-over is not taking place, perform the following tests:
- Check intake manifold change-over valve -N156- (perform final control diagnosis, if necessary, check valve and actuation).
- Checking vacuum system for leaks.
- Check that vacuum hoses are properly connected and free of leaks and obstructions.
- Check that change-over mechanism operates freely (move push rod by hand).