its hooked up directly to the obd2 port, which is the same that tuners use and that other scanners use. Pretty sure it doesnt get more accurate than that

 

Unless you want to read A/F as I've read that it's not an accurate reading.

I add the STFT and the LTFT and keep my eye on those levels. Adding them together should give you your 14.7 A/F reading and anything above or below that number would tell you if you are rich or lean Honestly though I dont know if that is even 100% accurate as I have seen readings of +19 when adding the two together :S

 

it reports what the ECU sees so it's accurate

boost, however, is not. The Evo ECU doesn't calculate boost in PSI or bar, it's a totally different thing called "load". So that is not accurate, if it shows at all, on most OBD2 meters

 

I've been told otherwise by other members on the site that A/F is not accurate as it's read from a narrowband and not a wideband.

I didn't know about boost though. So how does the AP read boost levels when you add the gauge on the screen? It seems mine reads boost and it looks accurate :P

 

What is the A/F called on the accessport? I've looked multiple times and can't find an A/F option to set as a gauge

 

The monitors you can setup for logging are here:
http://www.cobbtuning.com/Mitsubishi...bishi/monitors

and the gauges you can add to the AP are here:
https://cobb.app.box.com/mitsu-tuner-guide

As you can see there is no Air/Fuel....not that I can see anyway.

 

Hmm that's strange...my friend has a cobb ap for his Mazda and he has an A/F gauge. Maybe it's different for every car? Not really sure but that bothers me.

 

Maybe it does but I don't remember as I don't use it. After work I'll plug in my AP and check but from what I've read, even if it does have an A/F gauge it's not very accurate as it's reading the numbers from a narrowband. I've been told that that is not accurate enough. Someone prove me wrong though as I would love to be able to accurately read A/F without adding another gauge.

Well I drove to work today and checked the gauges. There is nothing for "A/F" but there are these which I have no idea what they do yet:

 

Even if it's somewhat accurate, it's better than not having it at all.

 

the AP air fuel measurement is accurate ONLY IF you are reading off a device like the Innovate LC1 or PLX.

Volkswagon uses wideband O2's stock, i dont know about Mazda, so yes, it's different by car.

It's like this, you have 3 parts to a wideband AF system:

1. O2 sensor. Aftermarket, usually a Bosch VW sensor

2. Air Fuel Controller. This is a box like the Innovate LC1, PLX, etc. Sometimes it's built into the gauge like AEM.
This box takes the signal from the O2 sensor, and converts it to a simple voltage signal that goes up or down, based on oxygen
that voltage signal then goes to...

3. Display. This can be a gauge, digital readout, computer, Greddy Informeter, or Cobb Accessport. The display translates the voltage into a something we can use.

So you need those three components, in whatever flavor you like.

 

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Perfect info thanks

So with all that said, once you get an extra O2 on your exhaust and the digital converter LC-1 box then you can use the AP gauge "WB LC-1 AFR" to accurately read A/F.

ikt: Does using the STFT and LTFM gauges do basically the same thing when adding the two together? Is that accurate enough? That's basically what I've been using.