Why Does the Engine Shake in Neutral Gear for Automatic Transmission?

[Branden]

Automatic transmission engine shaking or vibration in neutral gear may be caused by excessive engine carbon deposits, poor spark plug performance, unstable oil pressure, air intake system leaks, or clogged air filters. Below is an introduction to automatic transmission: 1. Definition: An automatic transmission eliminates the need for manual gear shifting while driving. The automatic transmission control system selects the appropriate gear based on engine speed and load, replacing the driver's subjective judgment and manual shifting operations. 2. Advantages: The advantage of automatic transmission over manual transmission lies in its ease of driving. Additionally, automatic transmissions include continuously variable transmission (CVT), electronic paddle shifters, and electronic gear lever shifting. Currently, vehicles have three types of transmissions: manual transmission, automatic transmission, and semi-automatic transmission.

[McConnor]

I've encountered this issue many times before. When an automatic transmission car is in neutral, engine shaking is mainly caused by worn spark plugs or faulty ignition coils. Over time, spark plugs wear out and can't ignite properly, leading to rough engine operation. If the ignition coil fails, unstable current supply causes shaking. Another common cause is a dirty throttle body - carbon buildup blocks the air intake, resulting in uneven fuel mixture. More seriously, loose or broken engine mounts pose a safety hazard, and delaying repairs increases failure risks. I recommend paying attention to the tachometer while driving - check spark plugs and throttle body if abnormalities appear. Regular maintenance can prevent many problems.

[Howard]

Automatic transmission shaking in neutral is commonly caused by clogged fuel injectors or a faulty mass air flow sensor. When injectors are clogged, fuel cannot be sprayed properly, leading to incomplete combustion and vibration. If the sensor fails, inaccurate readings cause the engine control unit to issue incorrect commands. This shaking increases fuel consumption and may damage the engine over time. These issues are often overlooked, so I recommend using an OBD diagnostic tool to check for trouble codes and then seeking professional repair. Addressing the problem early brings peace of mind, otherwise the car will become increasingly difficult to drive.

[DeIsaac]

Neutral gear engine shaking may stem from carbon buildup or fuel system issues. Excessive carbon deposits can block pipelines, causing the engine to gasp for air; when the fuel filter is clogged, supply becomes uneven. Sometimes it's also time to replace the spark plugs. It's recommended to promptly clean the throttle body, inspect the ignition system, and maintain fuel cleanliness for prevention.