I tried looking this question up in the search but nothing came up.My buddy just bought a 350z that had just gotten the Greddy turbos taken off of it. The CEL light is on and im wondering if it is a damaged O2 sensor or because they forgot to take off the aftermarket Injectors?

 

need to know the code before anyone can help.

 

go to Kragen/autozone and have them read to code for you, or better yet invest in an OBD II reader for yourself. They are pretty inexpensive.

 

The sensor says its either a 02 sensor, the injectors, or the mass fuel flow sensor(there is brand new one in so its not that)

 

That is a wide array of potential issues. what was the code that was thrown?