HI, I recently purchased a 1995 Eddie Bauer Bronco with the 351 engine. she runs and drives great most of the time, but I've noticed that when my fuel gauge goes below about a half tank, I start to have sluggish acceleration - above a half tank of gas, and there are no symptoms at all.
any ideas?

 

Check the fuel pressure under both operating conditions to verify if you really are having an issue.