Park Avenue Ultra V6-3.8L SC VIN 1 (1991)
Idle Speed/Throttle Actuator - Electronic: Service and Repair
Throttle Body
REMOVAL:
1.
Disconnect the idle air control (IAC) valve electrical connector.
2.
Remove the IAC valve attaching screws.
3.
Remove the IAC valve assembly.
CAUTION: On IAC valves that have been in service, DO NOT push or pull on the old IAC valve pintle. The force required to move the pintle
may damage the threads on the worm drive.
4.
Clean the IAC valve O-ring sealing surface, pintle valve, seat and air passage.
^ Use carburetor cleaner and a parts cleaning brush to remove carbon deposits. DO NOT use a cleaner that contains Methyl Ethyl Ketone. It is
an extremely strong solvent, and not necessary for this type of deposit.
^ Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft.
^ If the air passage has heavy deposits, remove the throttle body for complete cleaning.
^ Inspect the IAC valve O-ring for cuts, cracks or distortion. Replace if damaged.
NOTE: If installing a new IAC valve, be sure to replace with an identical part. IAC valve pintle shape and diameter are designed for specific
application.
Idle Air Control Valve
