wire problems

[bark]

ok, Ive built my harness using info from lt1 swap, I'm in mock up stage on my dbw 6.0l in a 76 stepper, I hooked it all up my pump ran for a second and my throttle body did a search phase, then has a kinda hum whistle sound to it, but does not open or close with throttle, also when I hook up my scanner It powers up but will not connect to the computer. I have not got my computer tune done yet, so not sure if that is why its not working, was just kinda hoping to fire it (not run, just fire. I know vats won't allow it), before I tear it all down for paint????

did I do something wrong, or will I have to wait for a tune before I bother trying?

thanks