FI ; ▁similar ▁to ▁G M ' s ▁Th rott le ▁Body ▁In jection ). ▁ ▁The ▁module ▁size ▁and ▁shape ▁were ▁approximately ▁the ▁same ▁as ▁the ▁E EC - II ▁and ▁still ▁util ized ▁the ▁external ▁memory ▁module . ▁ ▁The ▁two ▁modules ▁had ▁differently ▁key ed ▁connect ors ▁to ▁prevent ▁accident al ▁insert ion ▁in ▁the ▁wrong ▁vehicle . ▁ ▁E EC - III ▁uses ▁a ▁Dur as park ▁III ▁module ▁( b rown ▁g rom met ▁where ▁w ires ▁emer ge ) ▁and ▁a ▁Dur as park ▁II ▁ign ition ▁co il . ▁A ▁resistance ▁wire ▁is ▁used ▁in ▁the ▁primary ▁circuit . ▁The ▁distrib utors ▁in ▁E EC - III ▁( and ▁later ) ▁systems ▁eliminate ▁conventional ▁mechanical ▁and ▁vac u um ▁advance ▁mechan isms . ▁All ▁timing ▁is ▁controlled ▁by ▁the ▁engine ▁computer , ▁which ▁is ▁capable ▁of ▁firing ▁the ▁spark ▁plug ▁at ▁any ▁point ▁within ▁a ▁ 5 0 - deg ree ▁range ▁depending ▁on ▁cal ibration . ▁This ▁increased ▁spark ▁cap ability ▁requires ▁greater ▁separation ▁of ▁adjacent ▁distrib utor ▁cap ▁electro des ▁to ▁prevent ▁cross - fire , ▁resulting ▁in ▁a ▁large - d iam eter ▁distrib utor ▁cap . ▁ ▁The ▁F BC ▁module ▁controlled ▁the ▁same ▁Ford ▁ 7 2 0 0 ▁V V ▁car b ure tor ▁as ▁the ▁E EC - II . ▁ ▁The ▁C FI ▁module ▁fired ▁two ▁high ▁pressure ▁( appro xim ately ▁ 4 0 ▁p si ) ▁fuel ▁inject ors ▁that ▁were ▁mounted ▁in ▁a ▁thro tt