Ok so when I'm sitting in park and running, If I pushed the peddle slightly to rev up the engine and let off. She will go up fine but when she comes down she will studder and almost die out. If I shif

SOURCE: engine bogs and studders in low rpms usualy when warm

check head gasket look in radiator when cold,see if the water bubbles when cranking.

SOURCE: my car seems to be studdering and when it idles to low at a stop it shuts off. then sometimes it cant accell with out studdering so much i have to park it. engine is 13 months old.

I have the same thing right now and went to change spark plugs when you pull the wires out and theres oil down in there you need a valve cover gasket runs 39.99 49.99

SOURCE: 1996 VW Jetta with 2.0 engine. Dies when slowing from high RPM

I would check the EGR if your car has one it could be sticky, A Renault laguna we had did the same thing, died when letting it down to idle but would
recover, or when it died it would run fine on idle when restarted.
EGR was sticking on it. Vacuum lines could also be an issue.. EGR need vacum to work properly. Trotle body could also be worn, but normally that gives you an uneven idle.