Ford need some help

blackburban

2000 Dodge Durango SLT
Location
Duchesne, utah
was wondering if theres any one around west valley salt lake city that can help me on my ford bronco failed emissions 2 times and both times had something to do with spark plugs i did a tune up this morning and it got worst since i dont know fords at all im hoping some one can help me out tonight that knows fords and its a 1990 ford bronco with the 5.0L i have checked all wires to make sure they was on tight and also checked the cap and to me it looked fine but i dont know and also the number 8 cylinder aint firing can someone please help me out i got one more try for the emissions and want to get it passed
 
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