• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

91 Grand prix with problems...

So I am putting the engine back in the car and have a small question.
I have an oxygen sensor wire and a knock sensor wire that need to be plugged in.
but I only have one green wire available in the wiring harness.

all the books say a purple wire goes to the oxygen sensor and dark blue goes to the knock sensor....
the problem is the po cut the o2 and the knock sensor... . unless there is a part of the harness I can't see right now I am at a loss.

The po had the o2 sensor sorta twisted with the green wire.

thanks JC
 


the green wire goes to a sensor on the back cylinder head if its the one im thinking of... the purple one runs underneath the master cylinder shouldnt be too hard to find just look underneath it and you should see a wire by itself with a socket on the end. give me a few and ill show a couple pics of where the wires are. oh and the knock sensor is in the front of the motor over next to the starter(accidently pulled it one time looking for oil pressure sensor)

heres the o2 sensor wire(i got afr gauge wire on it thats the 2nd one spliced to it)
http://i1045.photobucket.com/albums/b456/mickell122590/0522112123.jpg

and is this the green wire you were talking about? if so its the coolant temperature sensor.
http://i1045.photobucket.com/albums/b456/mickell122590/0522112122.jpg

also bare with me i took these with my phone i dont own a real camera....
 
Last edited:
Is the purple wire part of the big harness that comes from the passenger side computer up and through the intake? I haven't found it yet....
 
You must log in or register to reply here.
Back
Top