MicroSquirt.com read only forum (Jan.15,2018)

in the megatune it says to select narowband for ego selection in the calibration section. do you use this for all applications or select your own wideband.
i ask this because i keep getting stupid figures on my afr gauge..it says its lean..even though i know its rich.

blake smoke and my eyes watering..but it says afr 22.0

Pommie02, these are the basic steps to set it up:

1. You can do this first step without being connected to the uS. On the laptop go to Start/Programs/Megatune/Megatune Configurator 2.25. In the configurator window click on the + box next to your project name, click on settings.ini then settings then Lambda Sensor. In the drop down box at the top of the page select the type of your wideband. Then click on file/save and exit the configurator program. This enables Megatune to work with your wb.

2. Connect laptop to uS, open up Megatune, make sure engine is not running. Go to Tools/Calibrate AFR table and select your wideband type. Burn to uS.

3. Make sure you are using the "WB linear" output wires of the TechEdge, not "SV Out". The ground wire for the TechEdge should be grounded at the uS grounds to ensure accuracy.

Ian.

Thanks Ian
i had a bit of a brainstorm.
the techedge was connected to my fuel pump relay. so i was trying to calibrate it with no power supply.
my afr gauge now shows 2.2 without the engine running...is this right ?

You need to do steps 1 and 2 in my post above regardless of what wb you are using. First you must do that. In step 1 in the post, when you are in the configurator, have a look at the "Lambda" (versus "Lambda Sensor") window, and make sure that the box is *not* ticked. If it is ticked, you will get Lambda instead of AFR. If it is ticked, untick it to get an AFR display.

You do not need to have power to the wb when doing any of the above. Step 1 tells Megatune what to expect from the uS in terms of wb signals. Step 2 tells uS how to interpret the voltage output from the wb controller. Or something like that.

Also keep in mind it takes about 20 seconds for a wb to warm up and give proper indications. It will not give any sensible information until 20 seconds is up.

Ian.