Hey guys, I just purchased an 05 wrx. It has injen intake, garret turbo, hks bov, 3" no cat exhaust. The previous owner said the guy before him had it tuned. It idles low and wants to die when the Rpms drop at the end of a rev. Also it smokes dark gray, when I get down on the gas, pretty sure running rich because you can smell it. Is this a tuning problem? I'm pretty sure it is, but I'm no mechanic and I'm new to turbo cars. I'm going to order a tactrix cable tonight. Iv read a few stickies but I'm not sure if I want to take a chance messing up my car by trying to do something myself.