Acura Integra idle problem

acceleration
acura
integra
pedal
rpm

#1

When I am driving my car around town, and come to a stop sign I put it in neutral as I come to a stop. However, my RPM’s stay around 2,000 instead of dropping to 700 or 800. My RPMs only go down when I quickly press and release the accelerator pedal. What is wrong with my car?