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I am sorry your having this problem
the most common issues are plugged fuel filters or low fuel pressure or restricted cat converters on these cars
if there are NO codes can you change the fuel filter and see if it still does this ?
if it does then remove the rear O2 sensor out of the rear exhaust manifold and take it for a quick ride it will be a little loud but this is just for testing
if the power comes back the cat needs to be replaced