- Spark plugs and ignition coils: If the spark plugs or ignition coils are faulty, it can cause the engine to misfire and run rough. Check the condition of the spark plugs and ignition coils and replace them if necessary.
- Fuel injector: A faulty fuel injector can cause the engine to run rich or lean, which can lead to a blinking check engine light and rough running. Test the fuel injectors and replace any that are faulty.
- Fuel pump: A weak fuel pump can cause the engine to run lean and misfire, which can lead to a blinking check engine light and rough running. Test the fuel pump and replace it if necessary.
- Oxygen sensor: A faulty oxygen sensor can cause the engine to run rich or lean, which can lead to a blinking check engine light and rough running. Check the condition of the oxygen sensor and replace it if necessary.
- Mass air flow (MAF) sensor: A faulty MAF sensor can cause the engine to run rich or lean, which can lead to a blinking check engine light and rough running. Check the condition of the MAF sensor and replace it if necessary.
- Vacuum leak: A vacuum leak can cause the engine to run lean and misfire, which can lead to a blinking check engine light and rough running. Check the vacuum lines for leaks and repair or replace any that are faulty.
- EGR valve: A faulty EGR valve can cause the engine to run rough and misfire, which can lead to a blinking check engine light. Check the condition of the EGR valve and clean or replace it if necessary.
- Timing chain: A stretched or damaged timing chain can cause the engine to run rough and misfire, which can lead to a blinking check engine light. Check the condition of the timing chain and replace it if necessary.
It is important to have the vehicle diagnosed by a qualified technician to determine the exact cause of the problem.
