if im not running a primary o2 sensor, that would cause my car to run like absolute **** right/ im pretty sure it does i just cant figure out why my car is running so bad, its a fresh rebuild.... it ran mint for one whole night, and near the end of the night right when it started throwing the cel for o2 sesnor, it started running really bad, bogging and hesitating when i push the gas....

o2 sensor the problem?

 

could be one of many things, but yeah if your o2 is bad the car will run like ****.

 

could be a bad cat converter

 

its striaght wide open header right now