i think i have a problem but i dont know whats causeing it when im at light or half throttle my blazer seems like its boggin down but when i punch it to the floor it runs fine and i dont know what to do ive checked the vacuum lines ive checked the carb ive replaced the fuel filter twice the fuel pump twice changed the pulgs plug wires distributor cap and rotor button and ive also droped the fuel tank cleaned it and replaced the sock on the assembly and im out of ideas anyone know what it might be

 

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