Hello all
Does anyone know what is connector is for?

 

Could be the o2 wire.

 

didnt think o2 sensor wire was that long, but i can check

 

i thought the O2 wire was purple. but it looks like the right connector

 

i had new bung welded in and o2 sensor put in and its connected per pic..i guess they left old connector in there. im gonna have to go under car to make sure the correct one is conected
im not sure why im unable to pull wire threw tho

 

The main harness is a purple wire but the o2 is usually a black wire.

 

Looks like the temp sensor wire that connects to your EGR valve.