Madmax670

I just got my Tech Edge 2A0 Wideband and I have some questions regarding install. I took out the old o2 sensor and put in the NTK one that I have. I unplugged the sensor from the stock harness. Where does that connector in the stock harness go?

I am assuming it goes to the ECU.

Basically my question is what is the stock setup with the stock o2 sensor versus the Tech Edge 2A0 unit that I have?

DaleClark

iTrader: (55)

It's really best to have both the stock sensor and the wideband at the same time. The connector goes back to the ECU - it uses the O2 sensor to determine idle and cruise fuel mix. Some widebands "fake" the signal a stock O2 sensor puts out so you can just run one sensor, but I've heard of some that don't do a good job with the fake signal, giving you some driveability problems.

Best route would be to have another O2 sensor bung welded onto your downpipe. Most muffler shops can easily do that for only a few bucks, especially if you take the downpipe off and bring it to them.

Dale

Madmax670

Does that really make a difference when running a PFC?

rynberg

You don't need the stock o2 sensor for running fine with the PFC -- you can manually tune your cruising maps how you like. There are tons of comments on the forum about how to install a wideband.

The instructions that came with the Techedge should cover all of your connection questions, but if not, there are write-ups on here. You can also check out Chris Regan's write-up here: http://www.negative-camber.org/crispyrx7/wideband.htm

Madmax670

Thanks, maybe I am not good at searching, but i did search for about an hour, if anyone could find anything i would be really grateful, thanks.

Also, so the consensus is that I do not need to weld a new bung and run both sensors? I have been getting conflicting information, what should I do? Why are people saying to run both?

books

iTrader: (8)

One would keep the stock O2 for emissions related driving.. low rpms, low load. However as Rynberg alluded to, many people just tune those cells to their own liking.
I have been running a Techedge wideband on 2 different RX-7s for about 3 years. I have had the sensor located in the stock sensor bung and in an extra bung.
If you are going to run it without the stock sensor then just turn the O2 feedback off via your commander

rynberg

You do not have to run both. HOWEVER, the sensor will most likely work better and last longer if it is placed further down the exhaust -- most people place it in the downpipe after it flattens out or in the hi-flow cat/midpipe right near the dp/mp flanges. It should be placed within 10 degrees of vertical or so.

As far as the actual connections go, should be pretty simple -- sensor to controller, power to controller (sensor must be powered whenever engine is running!). To send the output of the sensor to the PFC datalogit, you would run a wire from the 0-5V output of the wideband controller to the appropriate input on the datalogit box.

More detailed instructions should be included with your wideband or answers can be gotten from Techedge or the forum (try searching again!). Datalogit interface questions can be found in the PFC forum or in the datalogit yahoo member group.

Madmax670

Where should I run the wire from the sensor to the cabin of the car? Should I put it through the firewall, if so, where and how do I access it?

Maybe through the floor?

In need of some help, thanks.

Madmax670

Also, how do I get power to the wideband unit, where do i hook it up?

Do I need to put in a regulator or something so it doesnt fry the thing?

Madmax670

Come on.....

Madmax670

Power, can I hook it up directly to the batter?

InsaneGideon

Yea, geeze.

Do that. The power should be pretty damn clean at the battery itself. Last time I looked, I thought I saw some regulation in the TechEdge itself. Whether memory serves corretly or not, I'd assume it'd be there anyway for such a sensitive application.

Happy?

Sled Driver

iTrader: (9)

Yep, you sure can...............


But, in a day or two your car wont start due to a dead battery.

Just wire it to your cig lighter. It's switched so no power with key off.

FYI..........

I hot wired a AEM wideband to the battery for a track day (road, not that drag race crap) & my battery went dead in less than 4 hours, that includes 1 1/2 hours driving with the alt providing power.

The sensor is heated & must draw some serious amps. I had the info I needed & unplugged it.

I also wasted my 14 month old Hawker dry cell. I had to replace it (free, warranty exchange). Sucker wouldn't take a charge & didn't even have enough umph to push start. I spent the rest of the day jumping my car to complete each session.