Idle Air Control Valve: Installation

Install new "O" ring or gasket on valve. Coat "O" ring with oil. Install IAC valve. Tighten IAC valve on 2.8L (VIN 9) to 13 ft. lbs. (18 N.m). On all others, tighten retaining screws to 30 INCH lbs. (3.39 N.m). Install electrical connection. The IAC resets when ignition switch is turned from the "ON" to the "OFF" position.

1. Prior to installing new IAC valve, measure extended distance of the valve. See Fig 1. Measurement should be taken from valve housing flange to end of cone. If cone extends beyond specification, valve damage will occur when installed.
2. Distance must not exceed more than 1 1/8" (28 mm). IAC must be retracted to within specification. On all models except the "3800" 3.8L (VIN C), determine if IAC valve is Type I or Type II. Type I contains a collar at electrical terminal and Type II does not. See Fig 1. The "3800" 3.8L (VIN C) uses only Type I.
   Fig 1: IAC Valve Identification

   
3. To retract Type I, exert firm finger pressure on valve while moving pintle side-to-side. To retract Type II, compress retaining spring and turn valve clockwise inward. Reposition spring so straight portion aligns with valve flat surfaces.
4. Install IAC valve and gasket. Tighten to 13 ft. lbs. (18 N.m). On "3800" 3.8L (VIN C), tighten retaining screws to 18 INCH lbs. (2 N.m). Install electrical connection. On 2.0L the IAC resets when vehicle is operated above 35 MPH. On all others, the IAC resets when ignition switch is turned from the "ON" to "OFF" position.