Hey guys just recently (today) while going through 1st and 2nd at WOT when I change gear I get a popping sound, coming from exhaust I think? Is this bad? it smells kind of funky afterwards. Its alot colder now than when I had my tune done, could it be overboosting? BF MK11 Manual ute, injectors, monza, tuned to 380 RWHP. Was done with half a tank of fuel.