What causes vibration in the engine when you start the car?
What causes vibration in the engine when you start the car? Worn Out Spark Plugs. In many vehicles a common cause of engine vibration is worn out or faulty sparkplugs. Worn out or dirty sparkplugs will cause the car's engine to misfire or not properly fire on each and every cylinder. When this occurs, it is commonly referred to as the engine missing or not firing on all cylinders. What causes the engine to not fire on all cylinders? Worn out or dirty sparkplugs will cause the car's engine to misfire or not properly fire on each and every cylinder....