I just finished completely R&Ring the fuel system on my Coronet. New tank, pickup, fuel lines, pump, filter and rebuilt and deep cleaned the carb (a Street Avenger 875)

Problem is Im getting terribly low fuel pressure. I dont have a psi guage but when you get on it, the car stumbles and sputters and its not pulling enough vacuum to even fill up the (see-thru) fuel filter. It idles just fine and if I feather the throttle enough it will pull enough fuel through. But when its running, its just spurting through the filter. I pulled the rechecked the pump to make sure it was sitting on the pushrod correctly and it was OK. I also checked all the fuel lines. I richened up the mixture as much I could to see if that would help with fuel delivery and it didnt really make any difference.

The pump is a NAPA replacement part for a Hemi, which I figured would be substantial enough to feed my 875.