This Happened 2 Me Before It Sucks Right It Makes U Feel Like Ur Cars All Cheap Well It Did 2 Me Anyway. Hope This Works U Might Want 2 Check Ur Fitv (fast Idle Thermo Valve) Its Located Right Underneath Ur Throttle Body Inside The Fitv Theres A White Screw, 2 Remove The Fitv Disconnect The 2 Coolant Hoses Claps, And The Three 10mm Bolts That Hold It In Place Once Removed , Remove The Plate That Has Philip Screws Then Screw In The White Screw Then Reinstall It And Start Ur Car 2 Check If It Still Idles Good Luck If This Doesnt Work Also Check Ur Iacv (idle Air Control Valve