Low/Slow Idle, Stalls/Quits

Check idle air control systems. See CIRCUIT TEST HU in TESTS W/CODES article.
Check fuel delivery system. See CIRCUIT TEST HC in TESTS W/CODES article.
Check EGR system. See CIRCUIT TEST HE in TESTS W/CODES article.
Check torque converter clutch operation. See TRANSMISSION SERVICING - A/T article in the AUTOMATIC TRANS SERVICE section.