i noticed this today as i was in my driveway and the car was on idle..it idles fine at around 750-800..so i gas it to around 2000rpm and let go of the gas..the rpm would go down and just stop at 1000rpm and the engine would get louder..after a few seconds..it continues going to its normal 750..and everytime i would gas it and let go..it would stop at that same spot..then seconds later continue going to its normal rpm..any help? it wasnt always like this..it use to just drop to its normal rpm when i let the gas go..

 

yea, my car kinda does that too, i just thought it did that because it had so many miles. is there anyway to stop that and fix it?