Engine Stalls On Deceleration

Check idle condition. If vehicle does not idle properly, see ROUGH OR UNSTABLE IDLE .
Check Throttle Position (TP) sensor.
Check Idle Air Control (IAC) valve.
Ensure Engine Control Module (ECM) terminal voltages and grounds are okay.
Check EGR system, check EGR valve for sticking open and EGR solenoid for proper operation.
Disconnect Oxygen sensor and check if engine condition improves.
Check for poor connections at ignition coil, ignitor, distributor, high tension leads, TP sensor, Mass Airflow (MAF) sensor, Crankshaft Position (CKP) sensor, Camshaft Position (CMP) sensor, injectors, fuel pump relay and ECM.