Maybe someone can help me? I have a 2005 manual transmission, 2.3liter engine. When I first start it, it idles rough, but stays running. After it warms up, and I drive it a little ways, it stalls at stop lights, signs, etc. It seems to run fine when I am driving it. It stalls more when it's warmed up. Idles rough. I smell sulfur sometimes. My gas mileage has gone down. It may have started acting up like this shortly after I gave it a qt. of oil. Someone suggested the fuel filter and pvc valve (?). Someone suggested plugs and wires (this car has no wires- it has the coil thing) Someone suggested changing the air filter (this car doesn't have a changeable air filter). I have not had a problem starting it again after it stalls, but I am a little concerned I will start to wear out my starter. Any advice?

that sulfur smell sounds like your catalitic coverter is cloging up.

If it's been using oil that will clog up a converter. I'm not trying to be smart, but if it doesn't have a changeable air filter what does it have? Just asking.