Vibration in gas pedal when accelerating?

This sounds like an engine misfire. Have you noticed the check engine light on? If so, then we need to run the codes, have you done a tune up recently? A tune up may fix the problem, it could be just worn-out spark plugs.

Here are two guides to help us with instructions in the images below to help you with your car:

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

and

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

Spark plug specs
1.1 mm (0.043 in)
20 Nm (15 lb-ft)

You should also service the throttle body.

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

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.