i put a electronic choke on my 4160 holley 600 cfm.....i ran outta time installing it and never got it tuned up.....now if i havethe spring turned so the butterfly is allways all the way open, could it be messing up my mixtures so that when i give it gas in drive it almost floods(maybe...could be really lean i guess too....but the exhaust smells horribly rich)......the mixture screws are onyl 1.5 turns out though