Idle reset warm or cold?

[cmwwit]

Hello, i would like to reset my idle but im not sure if i should warm up the car first or do it stone cold and when i hook the battery back up then let it warm up? Thanks!, Chris.

 

[rubydist]

they want the car to be at operating temp when you do the idle reset, but I've done it with a cold engine and had it work. If its decent weather (50*+) I'd just do it from the cold engine and see how it turns out. If it idles fine after you are done, then run with it.

 

[itwonder]

My idle resets normally occur after doing maintenance which require disconnecting the battery. Naturally, the first start is on a cold engine. The idle reset works fine. I don't think I've ever tried it on a hot engine.