I have been trying to diagnose this issue for over a week now but becoming increasingly stumped. I've read countless threads on the same issue but haven't found any that apply to me.Car sits idling fully warmed up in neutral. I push in the clutch. I do not try and put it in gear, just push...

So I picked up a 99 GST yesterday, Fully rebuilt engine, Forged everything, AEM whole 9 yards, other then running a little rich, it ran flawless the whole way home (200 miles or so) about 25 miles from my house, rolling up to a light (now since this is a new build with like 400 miles on it now...