Engine shakes when accelerating and decelerating?

2017 CHEVROLET TRAVERSE

183,269 MILES • V6 • AUTOMATIC

TAWYANA10

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Hello! I have the vehicle listed above; I just got it on Tuesday. When accelerating from low speeds, around 15-20 MPH, it seems like the whole engine shakes for a few seconds and then stops. After that everything is fine, and it drives smoothly until deceleration around the exact speed and it shakes for a second or two again. It has no problems shifting gears.

Aug 16, 2024 at 9:56 AM

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Yep, this is a typical misfire, can I ask you if the check engine light is on or when the last time you had a tune up done? Here is a guide that can tell us which cylinder is misfiring and if any other codes can be affecting the engine.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Can you please shoot a quick video with your phone so I can hear the noise? that way I can tell for sure what's going on.

Here is how to change the spark plugs and coils out which I would do. I would also service the throttle body which needs to be done at the time of the tune up.

The spark plug is typically an ACDelco 41-114 or ACDelco 41-162.

https://www.2carpros.com/articles/throttle-actuator-service

Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Aug 17, 2024 at 9:23 AM