OK if anyone could help me out it would be appreciated. My car idles high (about 1600 rpm) when I pull up to a stop light, sign, etc. After sitting a few seconds it begins to slowly drop the idle down where it should be. Has anyone had this issue? Is this a vacuum issue or TPS? My car has very few mods as of yet. Nothing that I think would effect this. Equal flow headers, air box silencer removed, 3.73 gears, flowmasters and h pipe. That's about it. Thanks for any help.