Engine Stalls Intermittently
- Check idle condition. If vehicle does not idle properly, see ROUGH OR UNSTABLE IDLE .
- Ensure Engine Control Module (ECM) terminal voltages and grounds are okay.
- Check for poor connections at ignition coil(s), Throttle Position (TP) sensor, Mass Airflow (MAF) sensor, Crankshaft Position (CKP) sensor, fuel injectors, fuel pump relay and ECM.
- Check that MAF sensor and CKP sensor output signals are normal.
- Check EGR system, check EGR valve for sticking open and EGR solenoid for proper operation.
- Disconnect Oxygen sensor and check if engine condition improves.
- Perform INTERMITTENT PROBLEM DIAGNOSIS under INTERMITTENTS.