Engine Stalls On Deceleration

Check idle condition. If vehicle does not idle properly, see ROUGH OR UNSTABLE IDLE .
Perform switch monitor function test. See SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section.
Ensure ECM terminal voltages are okay. See PIN VOLTAGE CHARTS article in the ENGINE PERFORMANCE section.
Check for poor connections at ignition coil, ignitor, distributor, high tension lead, injector, fuel pump relay and ECM.
Verify correct throttle body dashpot adjustment. See ADJUSTMENTS article in the ENGINE PERFORMANCE section.
Check Idle Speed Control (ISC) solenoid valve. See SYSTEM/COMPONENT TESTS article in the ENGINE PERFORMANCE section.