Aftermarket Wideband to Rear O2 signal

[Sportsguy83]

Originally Posted by spdbydesignchris

Are you using the rear o2 sensor ground to connect? or connecting to a chassis ground location?


Where are you wiring the 12V + switched?

I'm so sorry I did not see this before....

Connecting to chassis ground, and the in car fuse box has an open slot that I used with an add-a-fuse for 12V

Originally Posted by xjohnx

Would like to know this too. Also, are you disconnecting the OEM rear O2 sensor harness completely and splicing in to the blue wire on that harness? Or leaving the harness connected to the o2 sensor and splicing into the blue wire?

Rear O2 sensor stays connected, the only thing cut is the blue cable.

Originally Posted by spdbydesignchris

After seeing the AEM Uego wideband, you would be simply running the 0-5V output wire from the gauge, inside the car, to the blue wire on the rear o2 sensor.


I'm using the passenger ECU wiring harness loom grommet, making a small slit with a razor and sliding the AEM harness through. (As well as the 0-5V output wire, which will need to go into the engine bay.)

I used the passenger ECU harness too.

[spdbydesignchris]

Originally Posted by Sportsguy83

I'm so sorry I did not see this before....

Connecting to chassis ground, and the in car fuse box has an open slot that I used with an add-a-fuse for 12V.

Can be purchased at NAPA

http://www.napaonline.com/Catalog/Ca...226_0361086491


Can you take a picture of the slot you used and post up?


Thanks!

[spdbydesignchris]

I want to reference this thread for our FT86 Turbo Kit thread, as there will be several DIY'ers, and I'd like to clearly lay out the install path.

[xjohnx]

Originally Posted by spdbydesignchris

Amazon.com: Bussmann BP/HHH ATM Add-A-Fuse: Automotive


Can you take a picture of the slot you used and post up?


Thanks!

You might want to get a low profile version instead, like either of these two:

[ame="http://www.amazon.com/Shipping-Holder-Circuit-Profile-Automotive/dp/B00EO5P2B4/ref=pd_sbs_auto_9?ie=UTF8&refRID=192VTBXPCTZEJQF7P CVP"]FAST Shipping! Mini Blade Fuse Tap Holder Add A Circuit Line Mini Low Profile ATM + 5A 7.5A 10A 15A, Car Add a Fuse Automotive Car: Amazon.com: Industrial & Scientific[/ame]

[ame="http://www.amazon.com/Littelfuse-FHA200BP-ATO-Add-A-Circuit-Kit/dp/B0002BGELQ/ref=sr_1_1?s=automotive&ie=UTF8&qid=1393427024&sr= 1-1&keywords=add-a-fuse+micro"]Amazon.com: Littelfuse FHA200BP ATO Add-A-Circuit Kit: Automotive[/ame]

[xjohnx]

Originally Posted by Sportsguy83

Connecting to chassis ground, and the in car fuse box has an open slot that I used with an add-a-fuse for 12V

Rear O2 sensor stays connected, the only thing spliced is the blue cable.

Thanks!

[Sportsguy83]

Originally Posted by spdbydesignchris

Amazon.com: Bussmann BP/HHH ATM Add-A-Fuse: Automotive


Can you take a picture of the slot you used and post up?


Thanks!

Our cars use the low profile mini fuse.

Need this type of add a fuse: http://www.ebay.com/itm/Mini-Low-Pro...item23315fcc74



See pic below. The slot BETWEEN 10A DRL AND 10A TAIL is available and its ignition 12V.

[spdbydesignchris]

Originally Posted by Sportsguy83

Our cars use the low profile mini fuse.

Need this type of add a fuse: http://www.ebay.com/itm/Mini-Low-Pro...item23315fcc74



See pic below. The slot BETWEEN 10A DRL AND 10A TAIL is available and its ignition 12V.

Thanks! Now time to make an auto store parts run

[spdbydesignchris]

Originally Posted by xjohnx

You might want to get a low profile version instead, like either of these two:

FAST Shipping! Mini Blade Fuse Tap Holder Add A Circuit Line Mini Low Profile ATM + 5A 7.5A 10A 15A, Car Add a Fuse Automotive Car: Amazon.com: Industrial & Scientific

Amazon.com: Littelfuse FHA200BP ATO Add-A-Circuit Kit: Automotive

Thanks, yes, found them at the local NAPA.


http://www.napaonline.com/Catalog/Ca...226_0361086491

[gdrider77]

Originally Posted by Sportsguy83

Rear O2 sensor stays connected, the only thing spliced is the blue cable.

Just trying to confirm and a bit confused. Here you say splice, typically splicing implies that you would keep the wire intact, and simply add the new wire to the same unbroken circuit.

But early on in this post

Originally Posted by Sportsguy83

Yes sir. I cut the O2 cable thus leaving the OEM harness intact.

You said you cut the blue wire and connected the new (white) wire. This sounds like you broke the circuit and left it open on the sensor side.

Can we agree that all we are actually doing is splicing into the blue o2 sensor wire with the wideband (white wire for AEM) output, and not cutting the wire in half?

Also, if thats the case, why go into the engine bay when you can simply do that at the ecu in the harness plug?

Thanks!

[Sportsguy83]

Originally Posted by gdrider77

Just trying to confirm and a bit confused. Here you say splice, typically splicing implies that you would keep the wire intact, and simply add the new wire to the same unbroken circuit.

But early on in this post


You said you cut the blue wire and connected the new (white) wire. This sounds like you broke the circuit and left it open on the sensor side.

Can we agree that all we are actually doing is splicing into the blue o2 sensor wire with the wideband (white wire for AEM) output, and not cutting the wire in half?

Also, if thats the case, why go into the engine bay when you can simply do that at the ecu in the harness plug?

Thanks!

I'm really sorry for the confusion... I cut the cable in two leaving the circuit in the sensor open. I onestly don't know if splicing would work, but my guess is that you don't want the Rear O2 signal interfering with the Wideband signal.

You can do it at the ECU connector also, I just didn't want to cut the OEM harness.

[spdbydesignchris]

Install is done, now I'm just waiting on the ATI vPod to arrive on Friday and I'll post up the completed pics.




Appreciate the advice provided

[gdrider77]

For those that have done this mod, can you tell me, will you get a check engine light and misc codes thrown initially? Thinking this is normal until i have the new tune with the updates to take this into account?

I have done the wiring, but wont have the new tune until i get the car to my tuner this weekend. Cant imagine there is any harm with the CEL, but wanted to confirm.

[jamesm]

Originally Posted by gdrider77

For those that have done this mod, can you tell me, will you get a check engine light and misc codes thrown initially? Thinking this is normal until i have the new tune with the updates to take this into account?

I have done the wiring, but wont have the new tune until i get the car to my tuner this weekend. Cant imagine there is any harm with the CEL, but wanted to confirm.

Yes you will definitely get codes if you haven't updated the tune.

[spdbydesignchris]

So far I have had to turn off P0138, PO13A and P013E.


I'll update if anymore pop up.