high engine rev on 2003 Mitsubishi Galant

when I first start engine the engine revs up for about to 1700 rpm for about 2 to 3 minutes and then starts to rev down to a normal rev. My mechanic has not been to identify issue.

by in New Port Richey, FL on November 27, 2009
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , January 07, 2010
Hi Ebony, Did you every get this resolved? Do you know if there were any diagnostic fault codes stored?