I have a 2007 Pontiac Torrent. I have had issues with the vehicle "sputtering" upon acceleration. It takes a while for the vehicle to come out of that and it smells when I accelerate through the issue (I have to so that I can speed up). I have been told for quite a while that it is the fuel injectors that need to be flushed. So I spent a lot of money doing that. It still does it. I keep taking it in with no definitive solution or cure.