[SCOTI]

It was a mechanical issue. There is one wire w/a clip that exits the wrapped bundle going to the injector module. I went back in to fix a leaking/missing O-ring @ the fuel lines (using a flashlight/in the dark). Apparently upon reassembly of the air intake & TB hat, I managed to rake this wire forward. I guess it was sitting there until the throttle plate was opened just enough. Once that happened, it dropped in & when I took my foot off the pedal it wedged itself in place.

I inspected things this AM & noticed right away the throttle plate cracked open & then saw the wire/clip. I pulled it out, secured the wire to the bundle, & everything is back to normal.