Technical Support

The engine is stumbling when cold

Ethanol is less flammable than gasoline, so the ignition problems can occur more easily when using ethanol. In some vehicles, a slight stumbling during the first 5 minutes of driving is normal in cold weather conditions. If the spark plugs or ignition coils are defective or have reached full lifetime, small stumbling can occur with a cold engine. If the engine is warm there should not be any stumbling with gasoline or with ethanol.

How to repair

  • We recommend that the engine be preheated in cold weather. Also when using gasoline
  • Add a few liters of gasoline to the tank
  • Replace worn ignition components