Is it normal for a car to shake at idle?

[StBentley]

If the car's idle speed is between 800 to 1000 RPM, it is considered normal. Reasons for idle shaking include: 1. Severe carbon buildup in the engine; 2. Issues with the ignition system; 3. Unstable fuel pressure; 4. Aging engine components, etc. If idle shaking is not properly inspected, it may lead to major potential faults. It is recommended to have it checked at a 4S shop or a professional repair facility. Solutions for idle shaking: 1. Clean the fuel system and check if the idle control valve has carbon buildup—it should be cleaned if necessary; 2. Check if the spark plugs have excessive carbon buildup and replace them if needed; 3. Inspect the fuel pressure and replace the intake pressure sensor if necessary; 4. Replace aging engine components.

[Velazquez]

I think it depends on the specific situation. Slight shaking during car idling is normal since it's a machine in operation, and there's a designed vibration range, especially during cold starts or with older models. However, if the shaking is severe—like noticeable steering wheel wobbling or seats vibrating—then there might be an issue. Possible causes include carbon buildup clogging the throttle, worn-out spark plugs, degraded engine mounts, or fuel line blockages. I've experienced this before with my old car—unstable idling and increased fuel consumption—but cleaning the throttle helped. It's best to monitor the shaking frequency; occasional shaking is fine, but persistent shaking should prompt a professional inspection to prevent engine damage.

[MariaLee]

Idle shaking is common but don't take it lightly. I've seen various cases while repairing cars. Slight vibrations that disappear a few minutes after starting the engine are normal, especially in new cars or right after maintenance. However, if there's persistent severe shaking, it could stem from ignition system issues like loose coils, intake manifold leaks, or uneven fuel injection. In older cars, it might be due to belt wear or unstable oil pressure. Last year, my friend's car had severe idle jumping caused by burnt spark plugs, which was fixed after replacement. It's best to regularly listen to the engine sounds and conduct periodic inspections to prevent minor issues from becoming major problems.

[StVincent]

As a novice driver, I was also nervous the first time I encountered idle shaking, but later I learned some things. Slight idle shaking is normal, especially in cold weather or when the air conditioning is on. However, if the shaking is severe or feels unusually bumpy, it's not right and may be related to an aging battery or dirty throttle. I remember the first time I drove an old car, it shook so much that I couldn't sit still, so I had to drive to a repair shop. After inspection, it turned out the air filter was clogged. Don't ignore it—safety first, and seek professional diagnosis promptly.

[LeTeagan]

From the owner's perspective, engine idling vibration is a common issue. I feel that slight vibration doesn't affect usage, especially in traffic jams. But if the vibration makes the driver's seat shake noticeably, you should be alert. Possible causes include excessive carbon deposits, aging rubber mounts, or dirty fuel injectors. Last time I had my fuel injectors cleaned during maintenance, and the idle became much smoother. Ignoring it may lead to increased fuel consumption in the long run. It's recommended to address this during routine maintenance.

[LeilaniLee]

Car enthusiasts who love maintaining their vehicles often talk about idle shaking. Minor shaking within the normal range is nothing to worry about, but pay attention to gradual changes. Possible causes include worn engine mounts, excessive spark plug gaps, or poor fuel quality; paying attention to these points during regular oil changes can reduce issues. In my experience, carbon buildup is the main culprit, and if not cleaned in time, it may damage the engine. A simple self-check by observing the warning light can indicate the severity, and if serious, take it to a professional shop for repair.