Possible Causes
- Camshaft Position (CMP) sensor malfunction.
- Crankshaft Position (CKP) sensor malfunction.
- EGR system malfunction.
- Excessive air leak in intake-air system between Mass Airflow (MAF) sensor and dynamic chamber.
- Fuel line leak.
- Fuel pressure regulator malfunction.
- Fuel pump malfunction.
- Ignition coil malfunction.
- MAF sensor malfunction.
- PCV valve malfunction.
- Plugged or restricted fuel filter.
- Plugged or restricted fuel line.
- Poor connection or wiring problems.
- Poor fuel quality.
- Purge solenoid valve malfunction.
- Secondary ignition system malfunction.
- Vacuum hoses damaged or improperly connected.