I Have a 97 Jeep TJ. When I first start it it immediately idles high and then drops. If it is cold it will stall unless I give it some gas. If it goes to rough idle I give it some gas and it pretty much smooths right out. It remains smooth after this. I wonder if anyone could help me figure out what the problem is. I have added fuel injector cleaner. That is pretty much it so far. Your advice would be appreciated.