[FattyBoomBatty]

I don't know about dsms' throttle cable, but you should leave the adjustment for the cable-jacket loose, let the car warm up then tighten it down with a little slack in the cable itself. Maybe when the car warms up, it's tightening up the cable enough to let the TB hang open a bit. just a suggestion.

And working out the bugs after doing an engine swap is the best part, because the hard work is over!