Throttle Body is not close/open smooth?
 

hi.
today i check my Throttle Body and i think is not close/open smooth. its feel lag when pressing pedal slowly. or its okay? what you think? can someone check his car and let me know?
(put the key in ON and try to smoothly press the accelerator pedal)

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its electronic Throttle Body - Mazda 3 - 2008 - AT