I had this problem when I ran my bird out of gas (bad sending unit)I have a quadrajet 4 barrel. That being said, crap from the tank got sucked up into the carb. even with a fuel filter, very small particals can get stuck between the needle and seat. I recomend trying this before tearing into the carb. By resticting the air flow while cranking it creates more suction, and just might be enough to clear it out. I tried this, and after a few attempts, it worked like a charm
I was going to suggest the same thing. Except I found this was a common occurance with Holleys. The good thing here about the Holley is that you can pull the needle valves out to clean them without taking the carb apart.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
