Major Problems - Need help, please

[dellfire]

So I was just given an 03 Grand prix GT. Having some issues. Very poor gas mileage, won't go bast 4100 RPM, no power, no acceleration, and making a noise that seems like exhaust near the rear of the motor. Think it might be the cat but not sure. Any ideas?

 

[GAFF]

4100 rpm while in park? that would be normal..

 

[dellfire]

No, while I am in Drive. Hits 4100 RPM, doesn't go further and no acceleration.

 

[gtpinsc]

post here... u will get helped out alot faster 3.8L V6 Naturaly Aspirated (L36)(L26) At Your grandprixforums.net

 

[TheOtherNick]

Please do not triple post. It is most likely a clogged cat.