It's very likely. Injector system should be fine though between the port injection and the direct injection. On the 3.5 in trucks the fuel pump is the shortcoming. Need to know what pump and lines are in the Bronco. I'm sure someone like 5 star will have that answer in the near future and offer what they can for E tunes.So, converting to run on E85 might require a more robust fuel pump than what the Bronco already has?
Personally though if you're just wanting E85 for the cheaper price and hope to offset the lost fuel economy it's a moot point. However if you want cooler combustion, less detonation, and ultimately more power then hell ya send it on some corn juice!!!
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