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Sputtering under boost acceleration

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Need help please

My 2003 wrx cut out and started missing a few weeks back so was recovered home i replaced the plugs and swapped 1&2 coil packs as was given a fault with no 1 missfire

Fault disapered and then give o2 sensor bank 1 so tested the sensor and found faulty so replaced. Still would not run phoned slowboy racing he said unplug the maf sensor so did and runs perfect so bought a new maf sensor and it now drives under normal driving but as soon as you want to hard accelerate it just bogs down? Have checked all pipe work and for airleaks and found nothing any one had anything like this before ? Any help would be much appreciated thanks

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