Idle Surge, Runs Rough Or Misses

WARNING: This page is about a different car, the 1995 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.

Check for vacuum leaks.
Check idle air control systems See SYSTEM/COMPONENT TESTS article.
Check ignition system. See BASIC TESTING - 3.0L article.
Check fuel delivery system. See SYSTEM/COMPONENT TESTS article.
Check EGR system. See SYSTEM/COMPONENT TESTS article.
Check PCV system.
Check engine compression and mechanical condition.