Buick Regal Catalytic Converter Replace/Remove

When I Try To Accelerate, The Engine Rpm's Will Increase Dramatically With Very Little Speed Increase. Knock Sensor, Control Module, Plugs-...

A Friend Recently Had The Cat. Converter Replaced. A Aftermarket One Was Used. Now The Check Engine Light Stays On All The Time. He Has...

Fuel Pump Has Been Replaced, Catalytic Converter Replaced. Plus Wires And Spark Plugs Has Been Replaced But Car Seems To Be Driving Sluggish...