so when i use the obd1 oxygen sensor (i have the complete rywire harness) do i just not use the obd0 plug and just like tuck that away....
And i dont remember where this goes but i took it off somewhere on the back of my a6 block or maybe i took it off of the back of the intake manifold.... but anyways it "somewhat" looks like a vtec solenoid, cause it has that cap that the vtec solenoid has but it is much bigger..... and it has a plug coming out of the top with one wire that is blue and the other wire is black w/ yellow stripe... and it has a two pin plug....... it seems to of been held in by two bolts.... and there is no space for this "thing" on my jdm d15

 

b to the ump