whoa!
first make sure you have not accidentally got the throttle plate rotating thewrong direction!
If you removed the throttle plate stops -this can happen.
the throttle plate stops just next to the low speed discharge hole - then - that edge swings back , across the high speed hole as it fully opens -
If reversed - this transition does not happen correctly - tho the engine will run -sorta -
As noted above - get the engine running FIRST , using the low speed needle - then slowly open the throttle and adjust the interaction of the low and high -
Unless something is buggered - about 1.5 turns is good start on each needle.