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Why does my Subaru shake when I accelerate?

If your Subaru is shaking when you accelerate, it could be due to a few common issues with the vehicle's engine or drivetrain. The shaking sensation is often an indication of a problem that requires attention to ensure your Subaru runs smoothly and safely.


Potential Causes of Shaking During Acceleration


There are several possible reasons why your Subaru may be shaking when you press the gas pedal:



  • Worn spark plugs: Faulty or worn spark plugs can cause misfiring in the engine, leading to shaking and vibrations during acceleration.

  • Fuel system issues: Problems with the fuel injectors, fuel pump, or fuel lines can result in an uneven fuel delivery, causing the engine to shake.li>
  • Transmission problems: Issues with the transmission, such as worn gears or a malfunctioning torque converter, can also contribute to shaking during acceleration.

  • Worn engine mounts: If the engine mounts that hold the engine in place are worn or damaged, it can allow the engine to move excessively, leading to shaking.li>
  • Unbalanced wheels or tires: Unevenly worn tires or wheels that are out of balance can cause vibrations that are felt through the steering wheel and chassis during acceleration.


It's important to have your Subaru inspected by a qualified mechanic to diagnose the specific cause of the shaking and address the underlying issue to ensure your vehicle runs smoothly and safely.


Troubleshooting and Resolving the Shaking Issue


If you're experiencing shaking in your Subaru during acceleration, here are some steps you can take to troubleshoot and resolve the problem:



  • Check the spark plugs: Have a mechanic inspect the spark plugs and replace them if they are worn or damaged.

  • Inspect the fuel system: Have a mechanic check the fuel injectors, fuel pump, and fuel lines for any issues that could be causing an uneven fuel delivery.

  • Evaluate the transmission: If the shaking is more pronounced at higher speeds, it could be a transmission-related issue. Have a mechanic inspect the transmission for any problems.

  • Check the engine mounts: Visually inspect the engine mounts for any signs of wear or damage, and have them replaced if necessary.

  • Balance the wheels and tires: Have a tire shop balance the wheels and inspect the tires for uneven wear that could be causing vibrations.


By addressing the underlying cause of the shaking, you can help ensure your Subaru runs smoothly and safely, providing a more enjoyable driving experience.

Why does my Subaru vibrate while driving?


If you've noticed your Subaru's steering wheel vibrating while driving, it can be a frustrating and unsettling experience. Steering wheel vibration can be caused by various factors, including worn or unbalanced tires, worn suspension components, and alignment issues.



Why is my Subaru stuttering when I accelerate?


Faulty ignition components, such as spark plugs, ignition coils, or the ignition control module, can lead to engine sputtering. Over time, these parts may wear out or become contaminated, hindering their ability to generate a consistent spark.



How do you fix a car that shakes when accelerating?


Motor mounts secure your engine to the car's chassis, absorbing vibrations. When these mounts wear out, the engine's vibrations go unchecked, leading to noticeable shaking when you accelerate. Replacing bad motor mounts is key to resolving this issue.



How do I know if my Subaru CVT transmission is going bad?


Identifying Subaru Transmission Failure
Delayed or rough gear shifting. Unusual noises, such as grinding, whining, or clunking. Slipping gears, where the engine revs but the car doesn't accelerate accordingly. Leaking transmission fluid or a burning smell.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.