Moody 2002 Buick Regal

My buick recently was having difficulties with acceleration, even simple things in town. Took it to the chevy dealer, said I needed a new catalytic converter and they did not do that so took the car to an exhanust place and $600.00 for new catalytic converter but still not running properly so they said I needed a new computer $400.00. Still not runnin and so they took it to the Chevy dealer who says that something is wrong with a ground or a wire and they are searching to find it.



Has anyone had a similar experience with the 2002 Regal-LeSabre? Any suggestions to get this bad boy back on the road?

Any Check Engine light on? Read the codes. What are they?