My 2010 Impala's rpm gauge goes up and down a lot when stopped, it is a little bit rough so I want to clean it. I have the throttle body cleaner and the tools to take it off but I heard that after I clean the throttle body and put it back on I have to recalibrate it or something like that? I just want to know if a recalibration of the TB is something that has to be done.
Thank you