INSPECT INTAKE MANIFOLD
Note
Do not adjust the adjusting screw or 2 swirl control valve actuator installation bolts.
Check the operation of the swirl control valve.
Check that the valve is fully opened under normal conditions.
Connect a vacuum pump to the control valve. Check that the valve is fully closed when a negative pressure of 35 kPa (263 mmHg, 10 in.Hg) is applied.
Leave it for 1 minute and check that the vacuum pump needle does not move. If the result is not as specified, replace the intake manifold.