So all of a sudden my car (AT) has like no power. I've driven it for almost 78k miles and it's never been this slow. At launch, I floor the car and it takes forever to get any type of power. Once it hits the 5k to 6k RPM range it finally moves a little.

I've changed the spark plug and cables, air filter, transmition oil, and have hooked it up to several computers with no errors messages. The only thing left for me to do is removed the exhaust to see if the cat might be causing the problem. Some one hit me a while back from behind so maybe something back there might be damaged.

If anyone has any other ideas what would cause this let me know. I've ruled out the transmition as the problem. Even checked the spark plugs (they are new) and reseated the cables.

 

could be coils or cat....if not might want to get the compression checked

 

sounds like a cat issue.
YOu mentioned replacing the plugs and wires, didn't change the coils?

 

clogged cat does lead to no power.