um...i'm really not good with cars and stuff...
but lately...when its really hot...when i start up the car, i notice smoke coming out of my tailpipe. (it doesn't smell like the usual CO exhaust, nor does it smell like smoke)
i know that's NOT supposed to happen...but can anyone tell me why it is?
also, about 3 months ago, i took my car to the dealership for a 100k mile tune-up...so there shouldn't be anything major right?