Hey guys, I'm new to the site. I own a 84 Mercury Capri RS Turbo. Recently it's been running a little rough and I haven't been able to figure out what's going on. Under boost and WOT the car seems to sputter, almost like a missfire but runs fine otherwise. If the turbo is boosting, but not WOT it runs fine too. Also sometimes when I first start the car, and the engine is cool it will sound like it's running on 3 cylinders, but then goes away minutes later. So far all I've done is clean out the IAC in order to get it to idle normal again (it would stick at 2,000 rpm then pulsate up to 2,500).