when i did my pinch test on my 75 ax it died right away so i richened it a little at a time until i got it too rich and there was still no difference,so i screwed the needle all the way back in and turned it out 2 1/4 turns and started it again tuned it a little and did the pinch test again and it died again i continued to richen it a little at a time and still no luck with the pinch test! what should i do now?