I have been trying to figure this one out. As far as I can remember it was working 5-6 months ago and once I just recently got back on this project I decided to update my tunerpro before I got back busy. I have not been able to get this thing to work yet. So here is the run down. I'm trying to tune the engine using emulation, I can't get the acquisition data to display anything other than what seems maxed out parameters. I had it setup to read a stand alone wideband using the port on the APU1 which it gave me good data on the screen but nothing else read correctly. I've seen post about adding a pause in the commands but my acquisition edit window looks nothing like I have read about. I had a chip that I did program months ago that I reinstalled and then tried to read the data using the ALDL connector and everything reads fine. Connecting directly to the ECM with the ribbon cable everything connects, DA shows good with zero errors but I don't get any data. Vehicle is a 1991 chevy truck tbi, ECM 1227747.
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YES!!! It was further down in the thread and I don't know if it was a fix for their issue, but I tried it and it works. Use the ribbon and the aldl connector at the same time. 
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