The ethenol does not help your lean issue. Check your gaskets at the carb for any leaks.Spray carb cleaner around them when it is running. Also check your woodruff key at your flywheel. They have been known to partically sheer and knock the timing out of wack.
2000 F350 4X4 Powerstroke red 6spd reg cab stock for now...
1988 Chevy IROC-Z camaro black 5spd 305 55,000 orig miles, my baby
1988 Chevy 4x4 350 ext long bed
1980 Gmc 4X4 modified 350 k20 flatbed 4spd
1956 6400 Chevy 235 6 cyl