Possible Causes of Unusual Vibrations During Acceleration

1. Engine or Transmission Mounts

Engine or transmission mounts are designed to absorb vibrations and keep the engine or transmission securely in place. Over time, these mounts can wear out or become damaged, leading to excessive engine movement and vibrations during acceleration.

• Check for visible signs of wear or damage on the mounts.
• Inspect the mounts for any cracks, breaks, or unusual softness.
• If any mounts are found to be defective, they should be replaced to restore proper function and reduce vibrations.

2. CV Joints and Axles

The constant velocity (CV) joints and axles are critical components of your vehicle's drivetrain. If they become worn or damaged, it can lead to vibrations, especially during acceleration.

• Inspect the CV joints for torn or leaking boots, which can allow contaminants to enter and cause damage.
• Examine the axles for any signs of bending or damage.
• Replace any worn or damaged CV joints or axles to eliminate vibrations.

3. Wheel Balancing and Alignment

Unbalanced wheels or misaligned tires can cause vibrations that are particularly noticeable during acceleration.

• Have the wheels balanced to ensure even weight distribution.
• Get a professional wheel alignment to correct any misalignment issues.
• Check for any uneven tire wear, which can be an indicator of alignment problems.

4. Tire Condition

Worn or damaged tires can cause vibrations under certain conditions, especially during acceleration.

• Inspect the tires for signs of wear, such as uneven tread or bald spots.
• Check for any visible damage like cuts, punctures, or bulges.
• Replace any worn or damaged tires to ensure smooth driving.

5. Driveshaft Issues

A bent or out-of-balance driveshaft can lead to significant vibrations during acceleration.

• Visually inspect the driveshaft for any signs of bending or damage.
• Check for any worn or damaged universal joints (U-joints).
• If issues are found, the driveshaft or the affected components should be repaired or replaced.

6. Engine Performance Problems

Issues such as misfiring, rough running, or poor fuel delivery can cause vibrations during acceleration.

• Check for any diagnostic trouble codes (DTCs) using an OBD-II scanner.
• Inspect spark plugs, ignition coils, and fuel injectors for proper function.
• Address any found issues by replacing faulty components or performing necessary engine maintenance.

Conclusion

Unusual vibrations during acceleration can be caused by a variety of issues, from worn engine mounts to tire problems. A thorough inspection of the vehicle, focusing on the drivetrain, suspension, and engine components, is essential to identify the root cause. Addressing and resolving the specific issue will help restore smooth acceleration and driving comfort in your 2016 Chevrolet Equinox. If you're unsure or unable to pinpoint the problem yourself, seeking assistance from a professional mechanic is recommended.