88 bronco 2 miss fire under load

i've go an 88 bronco2 it's sat for a while it's got a miss fire (poping) under load it runs rich i did plugs wires cap rotor modual pickup temp
sensor coil ecm retimed it there are no codes present fuel preshure is good help me what did i over look thanks chris there where a few other parts i put in also but to many to remember all
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