Hey guys i bought a 98 maxima with a vq35 swap for sometime now. Car runs like stock but the cel is buggin me and there are obviously sensors that arent connected.... My question is when the swap was done, should there be sensors unplugged??? Or should they all connect?... (i havent even tried connecting them to be honest lol or to even see if they plug into the harness)

Your help is all appreciated, thank you

 

The way auto manufacturers meet the emissions standards changes from year to year, so when you swap an engine from one year car into a different year car, a check engine light is guaranteed as well as things that don't plug in. You'll have to check the codes to see what they are and what way to proceed.

There have been many threads regarding this, so try searching for "engine swap" and read up.

 

1. Check codes.
2. See whats missing/disconnected
3. Fix it
4. ....
5. Profit.