slow return to idle

Hello all. I just had my intake and throttle body gaskets changed and now when I step on the gas in neutral or park it seems to take a longer time to return to idle speed.Any suggestions?

Eekman

Possibly a kinked throttle cable or weak return spring?

also maybe forgot to instal a vacuum hose or misaligned the intake gasket

Make sure that the idle air control (IAC) got cleaned out, also make sure the conector is hooked up right to the IAC, I have forgoten to hook that up before it the motor would not return to idle