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Hi All, My car is having a strange idling issue and the exact problem is as follows. After starting the car (when it is cold), rpm settles around 1300 and rpm doesn't get lower after engine got to the operating temperature. No matter how long the car runs, it stays around 1300. Few weeks ago this system was working fine. cold start rpm was around 1300 and after few mins it settles around 800-700. Now it doesn't work like that, but if I turn off the car and start it again when hot, then rpm settles around 800. If I leave the car for few hours to cool down and then start it, again rpm get stuck around 1300. So the issue is cold start rpm get stuck around 1300 and it doesn't get lower unless restart the car. If I restart the car when it is hot, then rpm settles around 800. Is this could be a possible ECU failure ? Any expert ideas ? Toyota Carina Ti 1997 MT ( 220000 kms ) Thanks in advance.