I have been trying to tune the thing for nearly a year... first using the stock ecm and O2 and some software getting slow datalogging out of the ALDL connector. Then got a chip emulator so I didnt have to burn the ancient technology 16k chips. Then I bought an amazing updated ECM w/ something called Embedded Lockers - http://dynamicefi.com/ Superfast datalogging and auto VE learn functionality teamed with the emulator I can tune in realtime with full datalog at highspeed.... and then added the wideband LC-1 -- BOOM! Now I'm cookin with gas. The car finally runs flawlessly, no surging, no stutter, no dying at idle, no fouling of plugs!
If you ever plan on doing any tuning. I now know that its not something you ease into. You have to get ALL the right tools off the bat or you'll have no success.
I think my next challenge is modifying this method to converting a Type 4 to GM thottle body injection using old Crossfire throttle bodies over custom intake manifolds.
Will update when that happens.
