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Hi my name is ***** ***** I will be happy to help with this today.I apologize for any delay.
There are a couple of common components or issues that will cause this here.First is carbon build up in the throttle body bore and bore plate needing cleaned out with a shop rag with carb. or brake cleaner sprayed on the rag.The other issues are either the accelerator pedal sensor sending an incorrect signal (as this sensor may not set a fault code sometimes) or the throttle position sensor (this sensor will usually set a fault code turning on the check engine light if this is at fault).These two sensor signals need checked using a scan tool that has data communication capabilities to read the sensors data signals to see if one is staying applied when your foot is released.If the accelerator pedal sensor is faulty usually the entire accelerator pedal needs replaced and if the throttle position sensor is faulty usually the entire throttle body needs replaced.
I would start with having the throttle body cleaned and a throttle relearn done with a scan tool to see if it corrects the issue here.If this doesn't correct the fault then the sensor signals need checked into.
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