Along those lines it's probably a plugged catalytic converter.One guess might be a restricted exhaust system.
I'm thinking it only has one cat converter - probably right after the Y where the exhaust pipes from both sides combine.ok it never has had a tune up the exhaust seems to be blowing out of the exhaust really good again it runs great but no acceleration power does the car have 1 or 2 cat converters maybe one is cloged