How ya doing? dont misunderstand me I'll help you any way I can ....I re-read my own post ,it does seam like I came off ,sort with you ...Please dont think im an ***** or a know it all ...I'm not..... really.... no kidding...Now with all that being said ...Lets work the problem.......CT was talking about closing the throttle all the way ,then run the low idle screw in until it stops DON'T force it just run it in until it stops ,Then back it out to 1 1/2 turns ...start your motor run to temp set the high needle ....run at full for about 4-5 seconds then return to idle ....if the engine is running rough on idle,the low speed needle is rich. If the engine speeds up and dies on idle or starts to detonate ,when you advance the throttle then it is to lean...set the reg screw flush with the casting /body before you do any of the above....try that and keep me posted....One more thing this fuel system is very suceptible to crap in the fuel so use a good filter like the YS or the Sullivan crap-trap filter.....JW