Caprice Wagon V8-350 5.7L (1994)
Idle Speed/Throttle Actuator - Electronic: Service and Repair
Idle Air Control (IAC) Valve Replacement
Throttle Body Assembly
Remove or Disconnect:
1. Disconnect electrical connector
2. Remove IAC valve assembly and gasket, discard gasket
Clean and Inspect
1. Clean IAC valve gasket sealing surface, pintle valve seat and air passage
2. Use carburetor cleaner to remove carbon deposits. Do not use a cleaner that contains methyl ethyl ketone, an extremely strong solvent,
and not necessary for this type of deposit.
3. Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft.
Install or Connect:
1. If installing a new IAC valve, measure distance between pintle and mounting surface. If greater than 28mm, use finger pressure to slowly
retract the pintle.
2. Install and tighten IAC valve