hi fellas any help on this one or has anyone had it b4 ?..............................got a 3.9efiv8 classic started to lose all power when accelerating then cuts out but when you start it up again runs sweet as a whistle press acceleretor agin it dies any help plz

I duno much, but I had a simular prob.......changed the HT leads and plugs and it seams to be ok now....i think it was a misfire. Mine never cut out though!