I remember you had a plugged catalytic converter a few months ago... What ever happened to that problem? If it seemed to kind of clear itself up until now, you will likely be spending a bit on a replacement cat, or at the least, replace it with a straight peice of pipe.
If thats not the problem... Did you possibly buy a bad tank of gas? I've done that a few times, and when I fill up next, the problem dissapears! Run some fuel line anti-freeze through your tank to get rid of any condensation that might have frozen in your lines and be restricting fuel flow. Also try some injector cleaner to free up gummed injectors.
Hows the air filter? Not saturated with water enough to freeze up and restrict air flow? Worth a check anyways...
(I am assuming its winter-time conditions where you live)
Other than that, I would have to pass the buck to one of our more knowledgeable members...
Good luck with that!
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