I just finished up the job of replacing the LIM gasket and when I started the engine the RPMs surged to about 1900ish and slowly fell to about 1100 and had periodic misfire. I turned it off, waited a few minutes and tried again with the same results. I didn't let the car run for too long, no more than 20 sec each time because I didn't want to hurt the motor. The car had been sitting for about 7 weeks because my college has class in the summer and just hadnt had a chance to finish it up until I got this long weekend. Could it just be old gas that started to break down in combination with idle relearn or did I mess someting up along the way? I labeled the plug wires when I took them out so they should be in the correct placement and I used the vacum line diagram to make sure I didn't miss anything. Any ideas will be helpful, I will put some fresh gas in tomorrow and try again but please post any other things that you think it could be.