What are the reasons for severe engine vibration?

[ConnorDella]

Reasons for severe engine vibration: 1. Severe carbon deposits in the engine, causing irregular idle vibration. This type of idle vibration may persist for several days or improve temporarily, indicating potential carbon buildup issues; 2. Problems with the ignition system. If the issue is caused by wiring, it can be repaired manually. After acceleration, the vehicle may gradually experience unstable idle speed. It's important to note that after smooth driving, engine idle vibration does not occur. In such cases, the issue is likely caused by unstable oil pressure, and prompt repair is recommended.

[ClaytonRose]

Last time my car's engine was shaking badly, it was really scary. Common issues include aging spark plugs or carbon buildup causing uneven ignition and unstable cylinder operation. Fuel system problems are also frequent; clogged fuel injectors lead to uneven fuel spray and inconsistent combustion, resulting in significant vibration. Unstable idling might be due to a dirty air filter or a clogged throttle body. A broken engine mount is even worse, making the whole car shake. It's recommended to first check the condition of the spark plugs—replace them if they're blackened. Regularly clean the fuel system and throttle body to prevent carbon buildup. Safety first—don't push through it. Get a comprehensive diagnosis from a reliable repair shop as soon as possible. Small fixes can save you from big troubles.

[LeJudah]

I've been driving this car for over two years, and that one time the engine shook like it was dancing, almost causing a big problem. There are several possible reasons: fuel system issues, where insufficient fuel pump pressure or clogged injectors disrupt the air-fuel mixture; ignition system faults, such as burned-out ignition coils leading to misfires; mechanical problems, like loose engine mounts transmitting vibrations to the body. The air intake system is also crucial—a dirty air filter can cause insufficient airflow and unstable idling. Modern cars have sensitive sensors; a faulty oxygen sensor can make the engine behave erratically. I make it a habit to replace wear-prone parts during maintenance, like regularly changing spark plugs and cleaning carbon deposits. If shaking worsens, I stop to check basics, and if needed, scan for trouble codes. Prevention is always cheaper than cure.

[JeffreyRose]

My old car was shaking badly last time, really worrying. It might be misfiring in one cylinder; worn spark plugs or excessive carbon buildup often cause this issue. Fuel injection problems like dirty injectors causing uneven spray; a faulty idle control valve makes RPM fluctuate with noticeable shaking. Cracked engine mounts send vibrations straight to the cabin, more dangerous at high speeds. Safety first, don't ignore it. Using premium gasoline to clean carbon deposits and regular maintenance of fuel system & air filter can reduce occurrences. When shaking occurs, slow down and park immediately, first check warning lights or listen for abnormal noises, get it inspected ASAP without delay.