I have a 2001 sls when you try to accelerate the car won't speed up. It idles on 2000 Cadillac Seville SLS

Car won't accelerate but idles down the road just fine it will not go over 15mph any ideas or suggestions would be greatly appreciated. I suspect catletic converter.

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2 answers 1 comment
DO YOU HAVE A CK ENG LIGHT ON? IF SO SCAN AND POST CODES SO WE CAN ADV. POSS ACCEL PEDAL SENSOR
I second #2 answer
sounds like you could have a plugged fuel filter I would start by replacing fuel filter and go from there