i had the same thing like 3 weeks ago , for a few days when starting it would be hesitant and shaky !
then one nite im out beatin on it and i stop at a light and i hear i loud ugly whistle , me being an idiot im like hmmmm lemme beat the crap outt've and see what'll happpen
i get to my store like 3 mins later the car is smokin , shakin , and makin very weird sounds from the exhaust which is also spitting ouut oil !
i open the hood take off the plenum cover or whatever and see this piece of s**t plastic hose split in half , like a real pos hose prolly no more than $2.00
i duct tape it and limp home , took it in to dealer and they replaced it no biggie
NEIL