[saltshaker]

Between 16-1900 rpm when cruising it surges or won't maintain a constant rpm. All other ranges work fine, it accelerates great but with all the different combinations i have tried it won't go away... Lean spike on lm2. I have tried 40 & 45 chokes,
60,65,70 idle jets, holders ranging from 100,105,110,115,120&125
F11&F2 etubes always the same problem. My best combo
428
48ida's
40 chokes
65 idle / 120 holder
160 main/175 air
70 pump jet( can't get smaller) 45 exhaust
18 int/38 total in @2600
Any thoughts?
Thinking about adding 3rd progression hole ...
Tuned with lm2
Jon