I have a 2006 saab 9-3 2.0t. When I floor it, sputters and missfires. Do you what that could be??? Any help would be great

those things are endless money pits. But start with the logical things like new spark plugs and a tune up and new air filter. If not that, get it scanned, it would have codes on that sophisticated Swedish car from a now bankrupt company. they went TOO far with tech on that thing