How do I connect and datalog my wideband with TwEECer?

[Jon 94GT]

The process of connecting your wideband to the TwEECer/EEC involves a few steps.

Note: This FAQ assumes that you already have a working and installed wideband on your car and that you are using CalCon/CalEdit v1.20b or newer.

1) The first step is to find out where the voltage output for A/F ratio is on your controller circuit. Here is the info I have (currently only the Australian DIY-WB):
1a) Australian DIY-WB v1.0: Pin7 on CON3 (diagram)

2) Connect this output to pin27 on your EEC (green w/brown stripe wire). There are two ways this can be done.
2a) Connect it to the wire directly at the EGR, this tends to be the most common method.
2b) Connect it directly to pin27 on the connector to your EEC. This is the method I used, as I feel it leaves less room for error from electrical resistance (shorter wiring). This however, involves dirtying up your harness as you have to cut the wire that goes into your EEC.

I only know the correct wiring for 94-95 v8 mustangs, as that is what I own, if anyone has different data for other years, please let me know so I can update this FAQ.

3) Assuming all electrical connections are good, the next and final steps are to setup a custom payload within caledit and datalog the results in calcon.
3a) Startup CalEdit.
3b) Click the tab labeled "Scalars" at the top.
3c) Change the value for "EGR System Type" to "2".
3d) Click the tab labeled "Utilities" at the top.
3e) The top right of the screen contains the various variables you may datalog (you may select up to 16). Select the items you would like to datalog, and make sure you include "EGR Valve Position for DIYWB".
3f) Click "Payload".
3g) Click the tab at the top labeled "Input / Output".
3h) Check the box labeled "Data Logging" which is right below the button called "Read EEC".
3i) Turn the key in the ignition to the ON position and wait 5 seconds (so windows can have time to load the USB driver to talk to the TwEECer).
3j) Click "Write TwEECer".

* wait for CalEdit to write the binary and payload to the TwEECer *

3k) Close CalEdit and Startup CalCon (CalEdit cannot write to the TwEECer while CalCon is open).
3l) Click the tab at the top called "Setup".
3m) In the box labeled "Select Wideband", select the appropriate wideband for the type you have. The Australian WB is the same as the "DIYWB".
3n) Click "Apply Changes".
3o) Click the tab at the top called "Dashboard" or "Digital" (doesn't matter which, just pick whichever display is preferable to you).
3p) Check the box labeled "Log to file" in the top right hand corner.
3q) Select the correct RT Method (pick from list under "Log to File" checkbox)
3r) Start the car.
3s) Click the button labeled "Start Logging".

If all is correct, in about 2 minutes once your wideband O2 sensor is heated up you should start seeing the A/F ratio displayed. If not...go back and make sure all electrical connections are correct and repeat step 3.

Additional information on the various wideband offers out there, and how to connect them can be found at:
Installation:
http://home.attbi.com/~pabooth/datalog_wideband.html

Wideband products:
http://www.diy-wb.com/
http://www.techedge.com.au/vehicle/wbo2/default.htm
http://www.iwantperformance.net/bailey_afm.htm
http://fjoinc.com

** If anyone sees any errors or has additional information to add to this FAQ, please let me know **

Last Updated: 5/6/2003

[86GT]

Yes the above is for Cal Con only. In order to do this with the BE, it is the exact same as far as the hardware goes. The list above up to 3e is identical.

In BE you will need to build a payload specific to your definition (strategy). Make sure to select the EVP as one of the payload parameters. Then in the upper right of the datalogging tab you will need to determine what you are using the EVP signal for, weather it be for a WB or a boost signal. Next you will need to define a transfer function.

Use as few points in the transfer function as possible. The more points you have defined the more processor time is required to look up the correct value as data comes into the PC.

Finally download the tune with the selected payload. Now when you start the next datalog, the values coming in on the EVP port will be scaled to the values defined by the transfer function in the EVP. The scaled values will be displayed and logged.

[cgrey8]

It seems adding an antifouler spacer to the WB may help extend the life of the WB. Here's some info from Cougar5.0 that came from a different WB thread:

I made a spacer for the sensor using a spark plug anti-fouler sold in the "Help!" section of most auto parts stores.
I used the Help! P/N 42002 18mm tapered seat non-fouler (due to it's longer length compared to the 42009) which I modified so the sensor would fit into it. I counterbored the large diameter using a 5/8" bit so the large diameter of the sensor would not bottom out. I added about 0.075" depth - from ~0.75" deep to 0.825" deep - DO NOT bore any deeper or you'll get into the diameter of the 18mm male threads and have 2 pieces on your hands. I then drilled out the smaller diameter to 1/2" so the sniffer "nose" of the sensor would fit. I beveled the 1/2" hole using the 5/8" bit so the gasses would tumble a bit as they pass over the edge of the opening & hopefully this will minimize any venturi effect. I then used the gaskets from a Help! 42009 spark plug non-fouler kit on both sides as the tapered seat of the 42002 would not seal well against the exhaust bung and the sensor seals better (and has to go less deep into the female threaded end) when using a gasket.

You can see the gaskets on either side of the spacer (pic in previous post above). I've run the new sensor for a bit and it seems to be working fine. I was a bit concerned about speed since the sensor is not directly in the exhaust flow, but the reaction time seems to be as fast as it ever was based on datalogs I've taken so far. With the sensor out of the direct airflow and the spacer acting like a heatsink/thermal mass, I expect that the sensor will likely live a long and happy existance. Total cost of the spacer - $9 (1 - 42002 $4, 1 - 42009 - $5).