[02_svt_guy]

Ok.. So where to start. first things first I have a CEL on and it has to do with my o2 sensor(downstream i believe). it has been on for a while and i have replaced it twice now. I am thinking my Cat is on the way out or already gone as i am starting to noticing driveability issues when the car warms. It jerks and hesitates at lower RPM's and miss's at idle. More recently i have noticed i cannot go more then half throttle or so in any gear as it goes into a full on misfit state of hesitation. Is this an issue with my Cat? i replaced the plugs last winter with e3 plugs so they are not the issue. Does anyone know if what i am experiencing is directly related to the cat or could it be a possible vacuum leak or a common problem? any help would be nice before i start throwing money at 02 sensors and a Bolt on Cat section.

Also it is def not my Clutch. When the car is cold it is fine.

Thanks,

Brandon