Why is your 1999 Ford winstar van idling?

Your 1999 Ford Windstar van may be idling due to several potential issues, including a dirty or faulty idle air control valve, vacuum leaks, or fuel system problems. Additionally, it could be related to issues with the engine's sensors, like the mass airflow sensor or throttle position sensor. Regular maintenance and diagnostics are essential to identify the exact cause and ensure smooth operation. If the problem persists, consulting a mechanic is advisable.