Chevrolet: 1992 chev cavalier, chev cavalier, cylinder head

Question
just reinstalled rebuilt cylinder head,problem encountering is no. 1 cyl not firing. move no. 4 injector to no. 1 cyl it fires , no. 4 cyl not firing. installed new injector in no 4 cyl problem persists,stuck need expert advice

Answer
I need a bit more info.

When you say "fire", you mean the cylinder gets spark but no fuel? How did you verify this? How do you know the cylinder is not getting fuel?

Did you pull the spark plugs to check the colour?

Whitish brown means not enough fuel.

Black or wet means no spark or too rich.