If i pump my primer bulb, engine runs strong, if i don't, barely idles

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Either way it's still running poorly, but the priming makes it run strong for a minute or two. Of course it's a fuel delivery prob.
 
Either way it's still running poorly, but the priming makes it run strong for a minute or two. Of course it's a fuel delivery prob.
Definitely a delivery problem, weak lift pump, filter issue?
I moved it to the Mustang group so maybe someone had the same issue and has a fix.
 
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