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^^^^^^^86 is when sefi injection became standard and was the only fuel management set up availible on the 5.0 and fuel delivery was calculated by method via what is known as Speed density= map sensor used to determine load along with other things
thanks mjr46,i get tired having to repeat all that almost daily
anytime......!!!!most have forgoten or even know that efi was availible on 84-85 mustangs..not oneof fords power packages to rant and rave about as the carb'ed models were the bread and butter of power for thoses years