air/fuel ratio wire

[Ep3703]

I just bought a air/fuel ratio guage and have been trying to put it in my turbo charged 2004 ep3. I have tried and tried and can not find what wire I need to hook it up to. I know that there is no real use for it because i have a narrow band o2 sensor and i know it might just be a lite show but just humor me......where is the wire for the o2 sensor on the ecu?

[urthworm]

i dont know where the wire is but our stock o2 is pretty much a wide band. ive used it for all my tuning.

[Ep3703]

well i didnt know that thanks......now i just got to find out what wire i need to hook it up to....ive looked everywhere

[POOPTOOTH]

Your attempting to put a narrowband gauge on a wideband sensor. Your readings are never going to be accurate. Do yourself a favor and sell that 'light show' gauge and by a decent wideband.

[Ep3703]

I have the stock O2 sensor if thats a wideband sensor then yeah i have one but the guage is also wideband Im pretty sure i need to know what wires to hook it up to thats it

[jimmyjames]

the narrowband a/f sensor is not that crappy if you hook it up correctly and turn off sensor preheat in kpro. I've had it for a while and it is not as blinky as people with the preheat on and correlates well with the primary readings; moves up and down nice and steady like it should. I believe there is a purple wire on the ecu bundle it needs to tap into.

[Ep3703]

I really dont know if it is its a auto meter pro comp ultra litr air fuel guage it has three wires red black and purple i would assume red goes to 12 v positive and black is ground i know the purple goes to a o2 sensor just dont know witch wire its is i tried the red and white wire and the blue and wire wire doesnt seem to gey anything. Theres a purple wire coming from my e manage but i dont see one actuallu from the ecu

[jimmyjames]

My bad, ecu wire is white with a stripe I think. I'll have to look into it unless someone knows.

[Ep3703]

Ive read that it was the white wire with red strip (Ive also heard thats the secondary o2 sensor) but i dont seem to be getting anything.

[jimmyjames]

http://www.ephatch.com/forum/showthread.php?56632-Air-Fuel-Gauge...Autometer&p=800167&viewfull=1#post800167
Ignore the part about the cat making lean readings.
Also see:
http://forums.clubrsx.com/showthread.php?t=264374&highlight=Air+fuel+guage+white+red+wire

[Ep3703]

thank jimmy james that really helped............just incase there is anyone else dealing with the same problems I had. The red wire on the right most connector does nothing not sure what its for but i didnt get a reading, however the white wire with red strip witch i believe is actually for your secondary o2 sensor did it(its on the left most connector). Thanks for everyones help.