What causes the new Polo to shake during cold starts?
2 Answers
The reason why the new Polo shakes during cold starts is due to low temperature and insufficient engine temperature. The detailed causes and solutions are as follows: Detailed causes: Excessive carbon buildup in the throttle; aging engine mounts; abnormal cylinder operation; unstable idle; ignition system malfunction. Solutions are: Severe engine carbon deposits, dirty throttle or excessive carbon buildup in fuel injectors require timely cleaning of the fuel system; ignition system issues, check the working condition of spark plugs, high-voltage wires and ignition coils, regularly inspect spark plugs for excessive carbon buildup and replace them promptly; unstable oil pressure, it is recommended to go to a 4S shop to check the fuel supply pressure and whether the intake pressure sensor is normal.
The shaking during cold starts of the new Polo is quite annoying. I suspect it might be due to improperly installed spark plugs or ignition coils. New cars generally don’t have carbon buildup issues, but it could be tight fuel injectors or incorrect ECU settings. I’ve encountered this while driving in winter, with causes including a dirty mass airflow sensor or low fuel pressure. During cold starts, the engine needs more fuel—if the air-fuel mixture is too lean, it will shake. Also, check if the battery terminals are loose, as this affects startup stability. Addressing it promptly is crucial to avoid worsening engine wear. I’d first suggest trying higher-quality fuel from a different gas station. If that doesn’t work, visit the dealership for a diagnostic scan. New cars under warranty get quick fixes. If the issue persists, driving at highway speeds for a while can help clean the system. For cold starts, try warming up the engine for a minute or two.
