damn motor, LS built from bottom up with my custom turbo set up is throwing a code 3. IT idles at 2k RPM constant and wont seem to lower itself even after long idle period. I tried lossening the throttle cable and adjusted the screw on the TB, still didnt work, then tried adjusting the damn distributor but that only made it go to about 1800 RPM still steady there. Any other suggestions. Thanks

 

Sounds like your MAP sensor isn't seeing enought vacuum.
good luck,
Jared