Rebuilt the engine 16valve.. It won't idle. Runs great @ 2k rpm. Timed right.

What is your question?

Set the timing via timing light and goofy wire in the monitor coupler. The idle is supposed to be 800 flat but when I crank the idle screw to get 800 it stalls out. Engine runs smooth and quiet at 2K rpm. The number 4 piston was burnt on the old engine. I'm going to cut the cat out. And looking for a new fuel filter. But I'm stumped.