- Misfires: A flashing check engine light, accompanied by rough running, is often caused by misfires. This can be due to a variety of issues, such as faulty spark plugs, ignition coils, or fuel injectors.
- Fuel system problems: Issues with the fuel system, such as a clogged fuel filter or a failing fuel pump, can cause the engine to run rough and stall.
- Vacuum leaks: Leaks in the vacuum system can also cause the engine to run rough and stall. Check for any loose or disconnected hoses.
- Engine mechanical problems: More serious mechanical issues, such as worn piston rings or a faulty timing chain, can also cause the engine to run rough and stall.
Recommended Actions:
1. Check the engine for codes: Connect an OBD-II scanner to the vehicle's diagnostic port to retrieve any trouble codes that have been stored. This can provide valuable information about the cause of the problem.
2. Inspect the spark plugs and ignition coils: Remove the spark plugs and check for any signs of wear or damage. Replace any worn or damaged plugs. Also, inspect the ignition coils for any signs of damage.
3. Check the fuel system: Use a fuel pressure gauge to check the fuel pressure in the system. A low fuel pressure can indicate a problem with the fuel pump or fuel filter.
4. Inspect the vacuum system: Check all the vacuum hoses for any signs of cracks or leaks. Replace any damaged hoses.
5. Seek professional help: If the problem persists, take your car to a qualified mechanic or automotive technician for proper diagnosis and repair.
