Wideband O2 sensor

[treas92]

Put simply, How do you put one in? Has anyone done it?

Do you replace the stock second O2 sensor? Do you put a new one in then splice the stock wire's into the loom?

Any info would be much appreciated.

 

[d3x]

Not unless you are running a standalone ecu

 

[topgunjames]

whats the point of a wideband sensor?

 

[Trondabron]

Not sure if your question is asking what you think it does...

How do you put one in is as easy (theoretically easy) as unscrewing your current one and screwing in a Wideband one. It can be hard because they are on reallllyyyyfracking tight!!! And on stock manifold, sometimes in weird spots.

Im guessing not many here HAVE put in Wideband sensors, because their cars dont have the technology to use the data that it provides.

Without going into the chemical details on how Narrowband/Wideband work etc, this is how I explain it to myself.

Due to the internals in the narrowband sensors, they can only detect changes in AFR in a short (narrow) spectrum around 14, because of this the ECU thinks of the car either running rich or lean, and not half rich, or half lean, etc. its one or the other.

Widebands are made differently, and can detect a much wider spectrum in AFR, and can hence give the ECU data which tells it not only if its lean or rich, but also how lean or how rich it is.


So as D3x said, you can install a wideband sensor, but your stock ECU isnt designed to read this type of data and therefore you will need aftermarket ECU. If you just want to have a wideband gauge, you can install a second O2 sensor bung in your exhaust and run a narrow for ECU and wide for gauge.

Hope this helps.

Also anyone feel free to correct me.

 

[d3x]

tron is spot on. In my case i wont be using mine for running the car...moreso for datalogging, and tuning and safety precaution

 

[topgunjames]

So basically allows the ecu to fine tune the correct amount of fuel the engine needs at any point to avoid things like misfire

 

[Trondabron]

tron is spot on. In my case i wont be using mine for running the car...moreso for datalogging, and tuning and safety precaution

So basically allows the ecu to fine tune the correct amount of fuel the engine needs at any point to avoid things like misfire

More or less, if your really chasing power and you want your AFR bang on, you can use wideband for much finer adjustment. Or if you just want hectic gauges you can whack one in too lol

 

[treas92]

My CH already has 2 O2 sensors. Would I still need to weld a bung in or just replace the second one? I'm mainly doing it for the Wideband gauge but I'm also suspecting my car of running rich so I wanted to have a look at the afr and start tunning.

 

[Trondabron]

My CH already has 2 O2 sensors. Would I still need to weld a bung in or just replace the second one? I'm mainly doing it for the Wideband gauge but I'm also suspecting my car of running rich so I wanted to have a look at the afr and start tunning.

Being a newer lancer, your car probs has one before the cat Converter, and one after??

This is so the car can do its whole tuning the AFR thing, but also to check that exhaust is being converted to harmless (less harmfull??) gases after the cat. basically making sure the cat is still working.

So you can

replace the second sensor with the wideband and put up with the Engine Check Light, as it will think there is something wrong with the second sensor since its removed.

weld another 02 bung in and drop your Gauge in. then when/if you want to tune, you can share your wideband o2 signal with your standalone ECU.

 

[treas92]

Sounds like a good idea. Wideband sensors are best put before the cat anyway aren't they?

 

[Trondabron]

Sounds like a good idea. Wideband sensors are best put before the cat anyway aren't they?

I would assume its best put close to the engine to minimise the delay between engine changes and the signal. Also yes, before the cat.

 

[matty]

If you are looking at a gauge the manufacturer of the gauge usually has written where it is best to place them and how to install. In some cases you can replace one sensor (first sensor closest to engine) and wire it into the ecu to operate as the narrowband O2. Not sure if this works for the lancers/mirages though. More than likely you'll get an exhaust bung with the O2 sensor/gauge kit when you buy it and you can easily get it welded onto your exhaust where it needs to go.

 

[Urran]

There are Wideband Lambda manufacturer's that make set's that can simulate narrowband for ECU. That way, you can replace the OEM 1st Lambda with wideband, keep ECU happy and LTFT's correct (so no damage to engine would cause from lean mixture or so) and also you can datalog it! Innovate would be ideal because EvoScan can datalog it by it's self (so you can get precise information of AFR, rpm, throttle position ect). Basically you can get all the information you need to tune your fuel maps on the road.

Also it is not recommended to put Wideband after catalysator. It should be placed before it, and if possible, not near the head (because of extra high temperatures). Also, if possible, placement so that it measures all the cylinders at once.