What Causes Severe Shaking When the Car is in D Gear?
3 Answers
Excessive Carbon Buildup: Severe carbon deposits in the engine cylinders can lead to clogged spark plugs and valves, directly causing shaking during idle. Fuel Supply System Malfunction or Unstable Oil Pressure: This can easily result in unstable mixture concentration, not only causing shaking but also leading to unstable idle conditions. Aging Engine Mounts: If the engine shaking becomes increasingly severe without a corresponding loss of power, it may be due to worn-out engine mounts. Misfiring or Cylinder Misfire: The issue often lies with the engine's ignition coil or spark plugs. If the ignition coil fails or the spark plug cannot fire for some reason, the car will experience shaking.
Last time when my car was in D gear, it shook violently, making the entire cabin tremble and causing a lot of driving anxiety. This could be due to aging engine mount bushings or spark plug issues. Worn-out spark plugs can cause uneven ignition, leading to unstable engine operation. If the engine mounts are damaged, vibrations are directly transmitted into the cabin, potentially causing bigger problems. Regular maintenance is essential, such as periodically checking the condition of the spark plugs and mounts. Additionally, idling vibrations might also be related—you can try manually shifting to neutral to see if the shaking reduces before deciding on the next steps. Safety first: if you notice this issue, take your car to a professional repair shop immediately. Don’t ignore it, as prolonged neglect could lead to transmission or engine damage, resulting in costlier and more complicated repairs later.
The car shakes violently when in D gear, and I've encountered this several times. There are quite a few possible reasons. For example, unbalanced tires or issues with the drive shaft can cause this. Unbalanced tires make the car sway when driving, while a bent or unbalanced drive shaft transmits vibrations to the body. Worn-out spark plugs are also a common issue, causing uneven ignition and engine shaking. Sometimes I check the spark plugs myself to save money, but you need to be careful. If it's a problem with the high-voltage lines or damaged mounting rubber pads, simply replacing the parts might help. However, if the shaking is too severe, don't force yourself to drive, as it can easily damage car components. It's advisable to first check if the brakes are functioning properly before considering professional diagnosis, to avoid more expensive breakdowns on the road.
