Low/Slow Idle Or Stalls/Quits On Deceleration

WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.

Check idle air control system. See TEST KE: IDLE AIR CONTROL SYSTEM under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article.
Check fuel delivery system. See TEST HC: FUEL DELIVERY SYSTEM under SYSTEM TESTS in SELF-DIAGNOSTICS - VILLAGER article.
Check Torque Converter Clutch (TCC) operation. See AUTOMATIC TRANSAXLE/TRANSMISSION article in AUTOMATIC TRANSMISSIONS.