Customer Service Techs
There are a number of things that can cause this issue.
Yes, you can be “starving” your carb for fuel. Check your float height and before moving on, verify that nothing is interfering with your needle valve & seat.
Inspect your intermediate (slow) jet & main jet. Make sure nothing is blocking their passages.
Inspect the condition of the diaphragm on your slide. Check for pin holes or tears.
Check for an intake leak. If intake seals have not been changed in a while, they may be due.
Check for a vacume leak.
Also, make sure that your gas caps are venting and that your fuel line is not kinked, or collapsing.
If you still have your stock vacume fuel valve, you may want to consider replacing with a OEM replacement, or Golan fuel valve.