AEM UEGO and stock o2 sensor question..

[turbodremz23]

I have read several places that I can delete one of the stock o2 sensors on my sc300 when using the AEM wideband, but have come up short on the details..is there a specific one that needs to be deleted, and how is it wired in so the stock ecu wont throw a cel?

[turbodremz23]

anyone have some information on this?

[domantas]

if aem uego has narrowband output you can spice it with both o2 wires that leads from the ecu and delete factory o2's. Thats what I did on my innovate wideband and it works great and it looks clean with one 02 setup. What I did is i followed the factory o2 wires to the ecu and had them spliced cloce to ecu. Mines is one wire (not heated), yours should be too since you 92

[IRACEMYCOPCAR]

I have read several places that I can delete one of the stock o2 sensors on my sc300 when using the AEM wideband, but have come up short on the details..is there a specific one that needs to be deleted, and how is it wired in so the stock ecu wont throw a cel?


Leave 1 stock o2 sensor in the down pipe, take out the other one and splice the signal wire into the one thats still in the down pipe but leave the heater wires hooked up on the one you took out, then tie the o2 sensor to the down pipe with some metal zip ties, make sure its out of the way because it will still get hot since the heater circuit is still intact.

What you are doing is tricking the ECU into thinking its getting the signal from 2 O2 sensors by using the signal from only 1 of them, you can then put the wide band in the empty spot.

[domantas]

can you wire the wideband that has narrowband output, instead doing both upper o2s? I know you can do this on 1 wire cars but what about ones with heater cirtuits?

[extremeboost]

as stated above as long as you splice the signal wire from you 2nd o2 sensor and leave the heater circuit intact and tie up the extra stock o2 you should be fine with running one factory 02 sensor. I suppose that you could use the wideband 02s narrowband output to send the narrowband signal to the ecu for the 2nd o2 signal, but there really isn't any need to do this. I cut the signal wire from my 2nd sensor and spliced it into the 1st sensor's signal wire and have been running great with no Cels for several hundred miles. This leaves the uegos narrowband output free for other uses.

[domantas]

having one o2 just looks cleaner, IMO

[Na-Ta10secstreetcar]

Pretty good information...

[white_raven]

so the white wire AEM says outputs 0-5v for ecu, that will work for stock ecu's? i thought that they needed 0-1v?

reference: http://www.aempower.com/images/products/Installation%20Instructions%2030-4100.pdf


edit: i did a little more research and found there is a calibration switch on the back of the gauge itself (page 9 of aem instructions) 2 questions: 1. which one would be the best for the narrow band output? and 2. does this affect what shows on the gauge?

[domantas]

not sure what the value is on out cars, but I know that LM! from Innovate has programable output and yet it wires to ECU, and get that stinky stock sensor out of there

[white_raven]

right which is totally awesome! but i bought the AEM to do that same thing, when I bought the 2j it came without o2 sensors so i was just going to run a wideband with a narrowband output to take the place of the oem o2's

[DrNick]

I've got the Innovate and yes it does have 2 programmable outputs. I ran one to my wideband gauge and one to my Emanage. For the stock ECU I just bought a generic $25 O2 sensor off ebay.

[white_raven]

Our stock o2 sensors Are 4 wire right?

[DrNick]

Mine was single wire. Just look at it lol

[white_raven]

I don't have any o2 sensors on my harness but I have two plugs that are not attached to anything but have 4 pins in them, so I wasn't sure. I'm still leaning my way around Jz wiring.

Also my motor is 95 that's obdI right? Or is that when Toyota was switching over?

[DrNick]

Oh that explains it :)

Mine is 1995 with OBD1 and 1 wire o2 sensor. But my car is a JDM model so you are best off checking with someone in the US

[white_raven]

yea i think i figured out how to wire it in, i'm going to do it this weekend and post results!

[white_raven]

So for those of us running obdII and want to replace our stock o2 sensors with a wideband's narrowband output, which pin do you run the narrowband output to?