Mines has been running rich as well.I believe this is more or less due to the fact that a bone stock SR is supposed to have the stock boost solenoids hooked up , so it can see that extra 3 psi of boost, vs the the minimal 7psi coming from the wastegate actuator alone. I know for a fact that my car runs rich, open downpipe = smelly exhaust, I can also hear the flames. I don't believe that running this rich can be normal, after about 3k miles , i popped a vaccum cap off and the car, after about 2 days (of not noticing the vaccum leak) ran so rich that it fouled the plugs out, and started misfiring. I was also wondering if a failing Coolant temp. sensor can cause a SR to run rich. Oh well, all the more reason to up the boost I guess?