Hey all, My rig has a surging idle and I was wondering if it is normal. It has been like this since I've owned it for the last 5 months. At first I thought maybe when the A/C kicked on the RPM increased but I think it does it regardless of whether the A/C is on or not. Then I thought maybe there was a big alternator draw? The engine idles around 500 RPM and then it will surge up to 800-1,000 for a while and then go back down to 500. It seems random - will do it at stop lights or when its in park and just sitting in the driveway. It might stay at 800-1,000 for a minute or two and then go back down to 500. Any thoughts?