2002 Nissan Xterra engine trouble

[Jamie1982]

I have a 2002 Nissan Xterra 4x4. My truck does not want to accellerate until ir reaches 30-40 mph. It also sometimes idols high and is starting to burn oil and my gas milage sucks! It throws a TPS sensor code, bank 2 cadilitic converter code and knock sensor code. I have replaced TPS sensor. I have good exhaust pressure from tailpipe. I cant find a vacuum leak? will cad converter cause my truck to run like this? What else can I check? Please help!!!

[alms24sebring]

yes. clogged cat will cause poopy performance. Good exhaust pressure doesnt mean crap, especially since its a V6. New cat, or gutted cat for a cheap solution but, dont expect to pass emissions.