Wide Band AFR questions
 

I am going forced induction next month and have a couple questions regarding a wideband AFR gauge.

1. If I get an AFR gauge I would like to have a failsafe built into my tune based on the readings from the AFR sensor. I assume with a custom tune this is easily added?

2. I plan on installing the kit myself but have no way of welding the bung into the exhaust. Is this a pretty straightforward thing for most shops to do? how much would they charge for this?

Thanks for the responses, I have learned a ton form reading through this forum.

1) yes tuner can do that based of the exhaust manifold sensor as well as your wideband - once you feed the signal back into the ECU.

2) AEM offers a 30 dollar or so kit to drill your own bung into the exhaust. Its a slip on device with no welding: http://www.aemelectronics.com/produc...-sensor-mounts

I personally would get one welded.

That no-weld bung was a good idea. I agree though, just get it welded in. The bung will probably cost around the same price e to have it welded in (I would think no more than 40-50, including the bung).

Just wondering if anyone has done the scaling work on the stock sensor at the rich end.

I was wondering and posted earlier today in mad_sb's thread:
http://www.ft86club.com/forums/showthread.php?t=27793

Mine reads down to 11.02. How accurate it is that low though would need a true WBO2 installed.

I'm still confused about how to hook up a aftermarket wideband sensor. Can I just remove the rear O2 sensor and replace with the aftermarket one? How do you connect the wires?

That's a good question, I'm not certain if the factory one can be swapped out with the wideband.

However, I know others that just feed their wideband signal into the secondary o2 sensor blue wire after snipping that wire.

So if i ran an AFR failsafe through a custom tune off the stock O2 sensor I wouldn't need to do any wiring at all correct?

More info from this thread - I had forgotten all about it:

http://www.ft86club.com/forums/showthread.php?t=57902

Edit: And these:

http://www.ft86club.com/forums/showthread.php?t=42764

http://www.ft86club.com/forums/showthread.php?t=49557

But isn't the whole point of swapping out the stock rear sensor for the wideband sensor is because the aftermarket one gives more accurate reading?

If you are just hooking up the failsafe to the stock sensor then you're still basing your safety cut on inaccurate readings....no?

man you guys are confusing me even more.... I've been trying to research this. I assumed you can't just replace it with a stock one.

I was planning on getting the berk overpipe that has a bung welded into it.

http://counterspacegarage.com/berk-t...-frs-gt86.html

off topic: Although doing this with the stock headers would be completely useless because of the cats correct? I wanted to start off with a wideband on the Jackson racing SC w/ the carb tune.

First off a wideband o2 must be before any cats.

Second you can run the signal from a wide band into the factory ecu (see previous links) but you need a good tuner and ecutek to build in a failsafe.

The stock o2 is pretty good, but it's not perfect.

I have an aem failsafe wired into my ecu.

Not true. The tuner must know about the cats or lack there of when tuning. My tuner was able to tune with the wideband sensor after the cat, no problem. Accuracy was spot on.

If you're going to flash with the off the shelf carb tune then having a wideband would be for your own observation / logging. Adding a failsafe mechanism would require the tuners assistance.

Sweet thanks a lot for the info dude.

Where's the best place to pick up a 12v ignition on switched power supply for an Innovate wide band ... :iono:

Even did a google on this and didn't come up with much at all.

I have an LC-2 under my drivers side electronics along with my hardwired radar and whatnot. There's plenty of switched power sources for you to add in an add-a-fuse. There are even a few empty fuse blocks with no fuses that are actually switched. Grab a multimeter and test them out. Some are always on, some are ACC, some aer IGN. I can take a picture when I'm out at my car tomorrow.

Sorry I'm still somewhat lost on how to physically connect my AEM wideband sensor and gauge. Please be patient because I'm really dumb when it comes to wiring up electronics :bonk:

I've got the AEM Digital UEGO AFR gauge (non-failsafe), and I'll be installing it in place of the factory rear 02 sensor.

But what I'd like to know is, how do I wire it up?
a) snip the stock sensor wires from the connector
b) fit the AEM sensor into the factory rear 02 bung
c) connect power and ground wires
d) join the AEM's 0-5v analog output wire to the blue wire off the factory connector

Is that correct? And will that allow my tuner to tune (using ecutek) accordingly? I don't have an electronic boost controller.

A pic would be good if you can and will have a go with the multi meter asap and see what I can find :thumbsup:

This is a question best asked of your tuner. There are only so many wires or methods or getting an aftermarket signal into the ECU. It sounds like you have the basic idea though. I wouldn't cut the entire connector off. Go up stream of it a little and just cut the signal wire. You can get power and ground from inside the car.

My plan was to get rid of the stock sensor, but leave the stock connector in place and simply join the AEM 0-5V wire to it. So effectively replacing/swapping just the stock sensor for the AEM sensor....if that makes sense?

I suppose I could get to the sensor's signal wire from inside, if I had was leaving the stock sensor in place and fitting the AEM sensor on a 3rd bung....but in order to physically remove the stock sensor to utilise that existing rear bung, I'd still need to snip something off at that point, no?

Yes, you get rid of the stock O2 sensor and it's wiring/connector and tap into the wire on the engine harness side of the connector.

Ah okay I see what you mean. So when looking into the engine bay, there won't be any anything plugged into where the rear O2 connector would normally go.....yes?

Yes. The plug is near the cam sensors on the passenger side of the motor if I remember correctly. Just un plug the rear O2 sensor and then remove it from your exhaust completely. Then tap into the wiring side of the other connector on your engine harness.

Ok I'm planning on buying a wideband O2 sensor to replace my existing second O2 sensor. I'm doing this so my tuner can tune an AFR failsafe into my tune. Is this the type of O2 sensor I should be buying to replace my existing sensor?

http://www.jegs.com/i/Innovate+Motor...mGgBoC51vw_wcB

That is just a replacement sensor for the Innovate LM2. This is what you need at a minimum:

http://www.jegs.com/i/Innovate-Motor...d=#moreDetails