Lm-1 to Tweecer hookup

[86GT]

OK, did you get a chance to read the voltage at an idle? gt90stang may have a point.

[QWKSNKE]

I think I am going to try this method this week (through the EGR). Clint, isn't this how yours is done? If so the pin listed below is for a sn95. Is this the same pin location on our cars?

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.

[86GT]

Yes, Mine is wired up to the the EGR sensor. I did not want to cut any wires so I cut a plug off an old O2 and crimped on a new pin for my WB. Now it is simply plug and play. I just unplug the WB and plug the EGR back in for emissions and vise versa.

I believe the pin is the same. Pin 27. I will have to check when I get home. I know the color of the wire is different for me. I am using an 86 wire loom.

[gt90stang]

The DataQ is much cleaner. Start with basic troubleshooting, connect the DataQ to your PC and start the DataQ software then ground input 1 to input common and see 0V. Then connect input 1 to one of the digital inputs you should get a change to ?V (sorry can't remember but you can measure it with a DVM). If that works then the USB to serial converter and DataQ are working right. Then you just have to get Calcon reading it correctly, use the standard 1-2V innovate.dbf file. You can do the same thing using a 1.5V battery or other voltage source into the DataQ and datalog to see if Calcon records the voltage input into the DataQ.

The USB to serial converter has software settings that have to be right also. Try 9600 baud (not sure what DataQ really needs I'm at work), 1 stop and start bit, hardware handshake...yada yada yada.

Next make sure the LM-1 is setup correctly...reset defaults if you have to. Do a free air cal and measure the voltage out of output 1 on the LM-1...should be around 2V or so (maybe higher I'm not sure). Once you get everything working connect it all together and it should work.

As you can see there is a lot going on here and everything has to be correct to work right. Also if you go the EGR route you have to disconnect the EVP sensor and disable EGR or it won't work right.

Good Luck, Don

[QWKSNKE]

I don't believe I have any dataq software

[Italian LX]

Originally Posted by QWKSNKE

I don't believe I have any dataq software

I have the CD at the house.

[QWKSNKE]

Originally Posted by Italian LX

I have the CD at the house.

was it installed with the other stuff the other day?

[Italian LX]

Originally Posted by QWKSNKE

was it installed with the other stuff the other day?

No.

[gt90stang]

Oh yeah one gotcha is that installing the DataQ software might mess up the Calcon software. There is a fix in the software section of the Tweecer site.

Don

[QWKSNKE]

ok. the data q software is installed and the item is calibrated.

It still does not read correctly in Calcon Calcon will read about 2 points off at idle and as soon as crack the throttle it will display 0.9-1.2 a/f in Calcon. I have the dataQ grounded with the EEC right now. I am going to try running a ground to the battery in a little while