kagan21

hey guys been wondering to replace the iac or not on my d16y8 motor. when i first start up the car it idles around 1,200-1,500rpm and it stays around that the hole time. now if i turn off the car after running for awhile and turn it back on it idles back down to around 500rpm and stays there so im wondering if the spring in the IAC is not messed up somehow or somewhere in the electronics itself if messed up and its not popping a code. i did change out the TPS if that helps and it was set by the shop i take the car too.