Was hoping i could get some input on where to start diagnosing a backfiring/popping/missing thats occurring under WOT in my 89 302. Recently replaced the fuel pump, lines and tank, as well as o2 sensors and idle control valve. The only codes i have are for the EGR valve which is capped because im unsure if its leaking or not and TAD/TAB which are deleted from PO. Any insight would be appreciated. thanks in advance