Go Back  Miata Turbo Forum - Boost cars, acquire cats. > Performance & Tuning > ECUs and Tuning > MEGAsquirt > MSPNP
Reload this Page >

A FIX for MS1 users (having trouble with AEM Wideband o2 calibration)

MSPNP MSPNP specific Megasquirt related discussion.
Sponsored by:
Sponsored by:

A FIX for MS1 users (having trouble with AEM Wideband o2 calibration)

Old 04-14-2014, 03:41 PM
Junior Member
Thread Starter
iTrader: (-1)
Join Date: Nov 2013
Location: GA
Posts: 171
Total Cats: -156
Lightbulb A FIX for MS1 users (having trouble with AEM Wideband o2 calibration)


It sucks for us MS1 users when our AEM wideband or any other 1-5v wideband o2 sensor does not match up with tunerstudio or is just reading slightly off.

Reason being that we do not have the "calibrate AFR" tool that allows us to just enter 2 data points like ms2 and up users can in their program.

After having issues for some time and chatting with LT401vette (aka Phil tobin from EFI analytics). Phil went through and somehow changed the ini file to have the MS2 and MS3 "calibrate AFR" tool in my ini file.

Hes such a nice guy for doing so and here are the instructions and the attached link to the thread and the ini file so you can have the tool as well. <-----link to file here

like he says it is best used with the beta version of TS (ver 2.5.19)

The ini with a Custom Linear Setting is attached.
However, it works best with version 2.5.19+, so I bundled the new ini with the 2.5.19 beta update.

If you use it with an older version it will work but changes to the calibrations won't take effect real-time for your AFR tables. It will be fine for the afr gauge and data log, but you won't see the calibration effect to the AFR table until your reload the project.

If you install the beta, to change to the new ini:
- Open your MS1 project in TunerStudio
- Open Project Properties (Press CTRL+P)
- On the Configuration Tab, Click "Show Advanced / Offline Setup"
- In the ECU Definition Drop down, select "MS1/Extra format 029y3*********"
-------> Important: This will already be selected, it will be the last selection in the drop down. You don't want the last one. Look up the list for the same selection that is NOT at the bottom. The Bottom selection is always simply the ini file that is currently used by your project. The listings above that are from the TS libraries.
- Click Ok.

Now your project should be on the new ini.

To use the new "Custom Linear Wideband" option:
- Open your MS1 project in TunerStudio
- Open Project Properties (Press CTRL+P)
- On the Settings Tab, Under EGO Sensor Selection, selection "Custom Linear Wideband"
- Click Ok, the project will reload.

Now you will have a new Menu Selection under Tools called: "Calibrate AFR"
In this dialog you can set the voltage and AFR for any 2 points and all other points will be linearly interpolated as they are for the custom linear option that is written to the MS2 & MS3 lookup tables.

http://msextra.com/forums/download/f...b9bac6708de674 <----link to file attached? ini file here
zacktrotter_uncc is offline  
Leave a poscat -1 Leave a negcat
Old 04-17-2014, 11:07 AM
Junior Member
Join Date: May 2011
Location: UK
Posts: 47
Total Cats: 0

is that still high-res code?
skinny is offline  
Old 04-17-2014, 11:38 AM
Boost Czar
iTrader: (62)
Braineack's Avatar
Join Date: May 2005
Location: Chantilly, VA
Posts: 76,387
Total Cats: 2,295

or you could have done the fix we did back in 2006...

but i will say that being able to calibrate in that manner is a much better solution.
Braineack is offline  
Related Topics
Thread Starter
Last Post
11-05-2018 04:05 PM
General Miata Chat
09-14-2015 03:17 PM
09-09-2015 05:19 PM
ECUs and Tuning
09-05-2015 08:02 AM
ECUs and Tuning
05-12-2009 08:50 PM

Thread Tools
Search this Thread
Quick Reply: A FIX for MS1 users (having trouble with AEM Wideband o2 calibration)

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.