2004 WR450 missing when revd from idle??

2004 wr450 tps mod...full fmf powercore4....gray wire mod...

My bike was running fine, no rev issues, then i changed the stock air filter to a uni foam filter and unplugged the tps..now the bike bogs and/or dies when i rev it??? First of all, i have no idea how the bike was even breathing with the stock air filter..especially since the filter was freakin nasty!!! If anyone has any advice, i would be greatful..thanks

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