I think you need to change your IAC valve, its very common for them to get all sticky and nasty at around 100K miles. I need to do mine, but not horribly. So im putting it off till I can get the tools to do it.
98 Corolla LE 1.8L DOHC 1ZZFE
TEIN H.Tech Springs
Tokico HP series Struts
Short ram air intake
Tsudo Axel Back Exhaust
... if a jelly fish stung me.. would you pee on the wound?