I have a 1998 S70 GLT, it starting running bad on my way home from work. When I stopped at a local gas station it cut off. When I started it back up it ran fine until I put it into drive and it started spitting and sputtering and when I tried to accelerate it was sluggish and seemed to misfire and the whole car was shaking. When I got home it smelled like rotten eggs, so I took it to a local muffler shop and had the catalytic converter replaced and it seemed to have fixed the problem until it warmed up and it started the same crap all over again. I tried to unplug the MAF and that did not help. Does anyone have any other suggestions?