Well I finally got my Cobalt back at 9pm last night, which I was dying to drive after driving that damn 05 Impala all week.

Well it was in there for one a plugged convertor (the thing was blowing black smoke like it was going out of style), and two throttle bodies? (thats what it says on my service slip). Well I just went out to wax the beast and decided to give it a rev because I noticed it sounded really good last night after it not being plugged or anything. So I just rev'd it up and black smoke it still pouring out of this thing like you wouldn't believe.

I just left a message with my service manager, but is this normal for these cars? or should I be worried?

black smoke is richness, these cars run rich for a reason..

2 tbs? yea somebody wrote the wrong thing there

Ya thats what I was thinking, so I don't have anything to be worried about?

nah its all good

blue smoke/white smoke.. then u can worry

Well thats the thing, it's not all black smoke, there is alittle bit of white in there.

I bet they did a throttle body service, were they clean out the fuel system, that crap takes awhile to go through your system especially if they put anything in your gas tank! I know that when you have your fuel system cleaned they put a cleaner in your injectors and a bottle of fuel service in your gas tank, and after the car runs at idle cleaning the injectors fuel rail, and intake the tech is suppost to drive the car. You wouldnt belive how much smoke will pour out of the exhaust when they drive it. Fact of the matter though I'm sure your car is fine and if not warranty:cussing: