Can the idle air control valve be adjusted on 98 ford windstar?

No, the Idle Air Control (IAC) valve on a 1998 Ford Windstar cannot be adjusted in the traditional sense. It's an electronically controlled valve, meaning its operation is managed by the Powertrain Control Module (PCM) based on engine parameters. There are no user-accessible screws or settings to adjust.

If your Windstar is experiencing idle problems, the IAC valve may be faulty, but it's usually not a matter of *adjustment*. Instead, it might need cleaning (though this is often only a temporary fix), or more likely, it needs replacement. The PCM might also need diagnosis to rule out other issues. A mechanic with a scan tool can diagnose whether the IAC valve is the culprit and then proceed with the appropriate repair.