Weird Idle

[95mitsugsx]

I just bought a 95 gsx last friday and have just noticed the idle rpm increases with what seems to be the outside temp. In the mornings before school it idles at around 1000rpm, though this afternoon when it was hotter it idled at 2600 rpm !!!!! and it also isn't stable moving up and down a few hundred rpm ( not too drastically) when idling. What could be the problem??? any advice is welcome and appreciated.

 

[mikeydsm]

I have the same problem ( minus the 2600 rpm idle) I was told it is idle surge. Worst case senario is that the ISC went bad. Its a 250 dollar part. DO a search there is alot of info on how to fix idle surge. It isnt a huge deal. good luck