Rough idle after 2 minutes it will come down to 1100rpm?

Tiny
RWALBROEHL
  • MEMBER
  • 2006 TOYOTA COROLLA
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 79,000 MILES
When starting car initial idle is like 1600rpm. After 2 minutes it will come down to 1100rpm.I put it in reverse car seem to run rough. Going forward after warming up and at a light it idles down to 700rpm. Seems to run not as smooth when its was new. My car does not have a throttle cable but is electronic. I can't see this IAC valve that they show on cars with cable control. I did clean the map sensor before and also cleaned the throttle body butterfly on the front side only as I didn't remove it. Is there anything else in that area that need spraying. I used the proper map cleaner and throttle body cleaner. There are no engine codes. So was wondering this design does not have a removable IAC that can be cleaned because I don't see one. Any ideas what to do next. I also changed plugs with new ones. Vacuum lines don't have any cracks. Did a relearn on the idle with key in key off and back on etc. No help.
Thanks
Bob
Sunday, March 1st, 2026 AT 12:30 PM

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