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I wouldn't blow air back through the fuel pump, I would disconnect the line feeding the pump and blow back from there, although it seems that you are getting fuel to the pump. I think your fuel pump is not working, the diaphram may have disintegrated.
Frank
Check for fuel line contamination. Sounds like the pickup in the tank is clogged or there is a blockage in the line. This is common in an older vehicle that sits unoperated for a time.
Frank