Hombre S Regular Cab 4WD V6-4.3L (1999)
Idle Air Control Valve: Testing and Inspection
Cleaning and Inspection
NOTE: If the IAC valve has been in service: DO NOT push or pull on the IAC valve pintle. The force required to move the pin tie may damage the
threads on the worm drive. Also, DO NOT soak the IAC valve in any liquid cleaner or solvent, as damage may result.
1. Clean the IAC valve O-ring sealing surface, pintle valve seat, and air passage.
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Remove excess carbon deposits with a small amount of carburetor cleaner on a parts cleaning brush. Follow any instructions on the cleaner
container regarding cleaner usage.
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Do not use a cleaner containing an extremely powerful solvent such as methyl ethyl ketone.
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Shiny spots on the pintle and seat do not represent a bent or misaligned pintle shaft.
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If heavy deposits are present in the air passage, remove the throttle body for a complete cleaning.
Important: Do not reuse the original O-ring.
2. Replace the IAC valve O-ring.
