fast idle
 

I have a 2004 sebring conv. with 2.7 engine starts fine but 30 seconds later idle jumps to 110 rpm and speedo goes to 20 mph anyone that has seen this before I could use your help Thank You for all replies.

if your talking bout the speedo going to 20 while driving with your foot off the pedal, then you most likely have a defective IAC, do you have any codes or the enging light on??