Hey guys,

I just got a NGK AFX wideband today, from another forum member. I d/l'd the manual, and searched the forums, but I didn't find anything on which wire should be attached to the stock ECU (i.e. where the narrowband was plugged into previously).

After some reading, I think I came to the conclusion that the ECU does not really need the O2 reading, and thusly nothing attaches to the ECU. Is this true? My other thought was that the V_out wire from the control module could be connected to the ECU. Maybe this wont work though, because the wideband outputs 0-5 volts, and the narrowband outputs 0-1 volt?

Any help on the matter would be appreciated.

Thanks,

Dan

 

you have the entire wideband assembly with the control module right?

On a wideband, you cant really connect it to a ecu, since the ecu only reads in narrowband inputs, and is only used in cruising throttle applications like on the highway.

you are correct that the v_out wire doesnt connect to the ecu. Its used for data recording or if you have another a/f gauge that read wideband outputs, you can hook that up as well. if you have a ecu that supports wideband inputs 0-5 volts, then you can hook it up to it.

 

Ok thanks, that's what I thought.

Yeah, I have the entire setup, module, sensor, and all.

When driving on the highway, will my gas mileage suffer greatly? It already sucks... and I have to drive about 700km twice a year, for school.

 

Yeah, knock off around 1-3mpg. But if you tune it, you should be fine.

 

So, I take it you're running the wideband sensor in the stock 02 sensor bung? The sensor won't last long there; move it about 36" from the exhaust ports. You could keep your stock 02 sensor that way too.

If the NGK wideband has a 0-1V simulated narrowband output, you can attach that to the stock 02 sensor wire, but the 0-5V won't work.

 

Keep the stock O2 sensor hooked up in the stock location. Wiring problem solved.

Install the wideband at least 36" from the outlet of the turbo to prolong the life of the sensor.

 

I run my LC-1 in the stock location, and also use it to simulate the narrowband sensor. I ran a wire from the narrowband output on the wideband to the ECU. I had to turn down the reaction speed of the wideband, but it works well now.

I had to buy the Innovate bung heatsink to keep the sensor from over heating. I was literally putting around and the sensor was getting too hot. I have not had a single issue after installing the heatsink however.

 

I'm not using the stock location. It's currently about 12 inches away from the turbo, on a 3" downpipe. The exhaust is fully welded together so it'd be hard to disassemble... and I don't have any welding tools. Will this location work?

 

Is there a heatsink available for the NGK AFX? Or can I use the location mentioned above (12" down from turbo, on 3" downpipe)?

 

12" isn't the best, but it's better than sticking it in the stock 02 sensor bung.

You can buy heatsinks for the Bosch wideband sensor for $50, or make one yourself out of a piece of copper or aluminum sheet.

 

Would it be fine if I put in a bung after a 3"in 3"out straight through muffler (that I'm using as a pre-silencer)? The exhaust is straight through, no cats.

If this worked, could I then run the wiring up and around the transmission, through the shifter hole? Or would that get too hot...

 

Sticking it after the downpipe is fine, as long as there are no cats or exhaust leaks before the sensor. Routing the wires up through the shifter boot is a common method. Mine is routed behind the heatshields, and up through the hole in the firewall used for the EM harness.