VehiCROSS 4WD V6-3.5L (1999)
Idle Air Control Valve: Testing and Inspection
Cleaning, Inspection and Measurement Procedure
Clean the IAC valve O-ring sealing surface, pintle valve seat and air passage.
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Use carburetor cleaner and a parts cleaning brush to remove carbon deposits. Do not use a cleaner that contains methyl ethyl ketone. This is an
extremely strong solvent and not necessary for this type of deposit.
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Shiny spots on the pintle are normal and do not indicate misalignment or a bent pintle shaft.
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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 the O-ring if damaged.
In order to install a new IAC valve, measure the distance between the tip of the pintle and the mounting flange. If that measurement is 28 mm (1.1 in.) or
less, the valve needs no adjustment. If the measurement is greater than 28 mm (1 .1 in.), apply finger pressure and retract the valve. The force required to
retract the pintle on a new valve will not damage the valve, shaft, or pintle.
NOTE: Do not push or pull on the IAC valve pintle on IAC valves that have been in service. The force required to move the pintle may damage it.
IMPORTANT: Use an identical replacement part in order to replace a valve. IAC valve pintle shape and diameter are designed for the specific
application.
