I recently bought a 2003 TJ. When I bought it I didn't know that it was severely underpowered until I drove my friends TJ. It has 33's with 4.56 gearing. It had been throwing a P0432 code so I dropped the cat's and there was one that was dislodged and had fallen down. (Pic below) I thought this would fix the problem of it being slow due to the clogged cat, however after replacing this it still has no power. What I mean by no power is that once I hit 2000 rpms there is no more acceleration no matter how hard I push the gas so I always have to shift at 2000 rpms. Does anyone know why this could be? I can't even keep up with guys who have 35's and 3.73s in the mountains.
I replaced all 3 cats and still doesn't feel any different. You'd think id e able to feel a difference since the car was so lodged in there.