Getting Air/Fuel ratio out of Nissan Data Scan (NDSIII)

NissanTracker · 10-10-2017, 08:23 PM

Hi,

I have Nissan Data Scan NDSIII and I'm trying to get the stoichiometry. Is there a way of getting this as a typical wideband displayed value?

-NT

NissanTracker · 06-22-2021, 11:26 PM

I'm still interested in this... anyone?

SonicVQ · 06-23-2021, 08:21 AM

I don't have NDSII, but I do have NDSIII Lite...

NDSIII Lite does have "WB Sensor 1/2", which is the wide band O2 sensor (aka air/fuel ratio sensor) BUT the value is in volts and not lambda or AFR.

Most of the AFR sensors Nissan uses indicate stoichiometric (14.7:1) at 2.20 volts, but that doesn't tell you much, like how rich or lean the fuelling is. It is not a linear relationship, so you can't use slope/offset to calculate it... it needs a lookup table.

BUT you can use Torque Pro or OBD Fusion and add it as a gauge on the dashboard.

Starting in 2008, AFR is a standard OBD PID and depending on how you configure the app, you can display it in AFR or (the better!) lambda.

This will work for your 2014, but I don't think you will see the "O2 Sensor Lambda" for your 2007.

THE BULL · 06-23-2021, 11:43 AM

I ditched NDSIII. I have the advanced versions of Torque and OBD fusion and these are better apps than NDSIII.

After Installing Uprev I realized that even with a good dongle the apps will never be as fast as a wired setup hooked up to a laptop.

The engine will try to his Stoich as quick as possible, the problem I faced was it was almost all the time in Stoich and just would not react as quick as you need.

SonicVQ · 07-03-2021, 10:53 AM

Quote:

Originally Posted by THE BULL

I ditched NDSIII. I have the advanced versions of Torque and OBD fusion and these are better apps than NDSIII.

After Installing Uprev I realized that even with a good dongle the apps will never be as fast as a wired setup hooked up to a laptop.

The engine will try to his Stoich as quick as possible, the problem I faced was it was almost all the time in Stoich and just would not react as quick as you need.

My OBDLink MX+ gives me about 43-45 PID/second, which is VERY good.
If you want the fastest OBD speed, get an OBDLink SX (USB scanner) and with an "on the go" (OTG) cable on my 4 year old Android tablet, OBDLink shows 160-180 PID/sec.

Using the SX cable on Windows gave about 64 PIDs/second, which is also very good.... but a little hard to drive with a PC on your lap

10-10-2017, 08:23 PM	#1 (permalink)
NissanTracker Track Member Join Date: Jun 2016 Location: Massachusetts Posts: 724 Drives: 07' Nismo, 14' Nismo Rep Power: 29261	Getting Air/Fuel ratio out of Nissan Data Scan (NDSIII) Hi, I have Nissan Data Scan NDSIII and I'm trying to get the stoichiometry. Is there a way of getting this as a typical wideband displayed value? -NT

06-23-2021, 08:21 AM	#3 (permalink)
SonicVQ Base Member Join Date: Jan 2016 Location: Ontario Posts: 230 Drives: G37 Sport Rep Power: 6720	I don't have NDSII, but I do have NDSIII Lite... NDSIII Lite does have "WB Sensor 1/2", which is the wide band O2 sensor (aka air/fuel ratio sensor) BUT the value is in volts and not lambda or AFR. Most of the AFR sensors Nissan uses indicate stoichiometric (14.7:1) at 2.20 volts, but that doesn't tell you much, like how rich or lean the fuelling is. It is not a linear relationship, so you can't use slope/offset to calculate it... it needs a lookup table. BUT you can use Torque Pro or OBD Fusion and add it as a gauge on the dashboard. Starting in 2008, AFR is a standard OBD PID and depending on how you configure the app, you can display it in AFR or (the better!) lambda. This will work for your 2014, but I don't think you will see the "O2 Sensor Lambda" for your 2007. JARblue likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[WTB] Air-Fuel Ratio Sensor	Ni55anPat	Parts for sale (Private Classifieds)	0	07-17-2017 04:03 PM
Question Air fuel ratio sensor. Please thanks	Nismo1989	DIY Section (Do-It-Yourself)	0	12-23-2015 04:46 AM
Rich air fuel ratio. Need help!	Wilson2608	Tuning	0	11-17-2015 09:59 AM
[WTB] In need of air fuel ratio sensors	alfonso5110	Parts for sale (Private Classifieds)	5	12-04-2012 04:13 PM
Air fuel ratio gauge	Zamir370z	Nissan 370Z General Discussions	6	10-03-2011 06:48 AM

06-22-2021, 11:26 PM	#2 (permalink)
NissanTracker Track Member Join Date: Jun 2016 Location: Massachusetts Posts: 724 Drives: 07' Nismo, 14' Nismo Rep Power: 29261	I'm still interested in this... anyone?

06-23-2021, 11:43 AM	#4 (permalink)
THE BULL Base Member Join Date: Apr 2021 Location: Florida Posts: 217 Drives: G37S Rep Power: 26848	I ditched NDSIII. I have the advanced versions of Torque and OBD fusion and these are better apps than NDSIII. After Installing Uprev I realized that even with a good dongle the apps will never be as fast as a wired setup hooked up to a laptop. The engine will try to his Stoich as quick as possible, the problem I faced was it was almost all the time in Stoich and just would not react as quick as you need.