Idle problems on hot start
 

So i dont know if this has happened to anyone else before but after my z is warmed up it idles like it is missing and sometimes stalls. I have to rev it to "clear it out" it seems but other times it will just stall on me. It is an all stock 09 and I dono what would cause this. If anyone has some input let me know! Thank you!

Are you getting any CEL's?

Check engine light came on once but when we ran it nothing came up since they said "its the first time it happened so it doesn't show" but they just cleared it and hasn't come on again but problem still happens