My 1999 honda accord AT has 50,k miles. I was having a surging idle and a code for the iacv. so I replaced the iacv and cleaned the throttle body. Now some times Idle is normal and some times it will idle at around 1.7k when warm. I'm wondering if it could be some sensor that tells the computer the car is still cold. Any ideas much appreciated. Thanks

 

Duplicate... Lets keep it in one thread to avoid confusion.