Hyundai Repair: Probable exhaust problem, hyundai elantra, catalytic converters

Question
My 2001 Hyundai Elantra has about 100k miles. It runs fine at about 20-25 mph. It won't accelerate too well, and although I have the pedal to the floor and the rpm's increase I'm getting no power. I just had the catalytic converter changed two weeks ago but still no exhaust is coming out of the tailpipe. Could it the pipe leading to the muffler be clogged?? Thanks

Answer
Hi, Marcus.  Your car has two catalytic converters.  So one possibility is that the other catalytic converter may be clogged as well.  Additionally, if a large piece of the rear (under car)converter broke loose, it could be lodged somewhere else in the exhaust, most likely the muffler itself.