I have a '92 Bronco with a 302. Several months ago I put new wires, new spark plugs, and a new ignition coil. About 3 days later the idle jumped up from normal to 1500 rpms. I was wondering if anybody else has had this problem. I was told by a mechanic friend it might be the EGR valve or the idle air control. I was wondering if it might have something to do with the computer before I start replacing stuff. Thanks!