sputters, backfires, doesn't die but won't accelerate. replaced fuel filter and put non ethanol gas in. no improvement
96 ranger 4 cyl ran fine till put ethonol gas in now won't run on 1996 Ford Ranger
You need to check fuel pressure and volume with a fuel pressure gage. So what you are saying is that in the 16 years of service you never used regular unleaded fuel with 10% ethanol? You have a bad fuel pump. I suspect it is a volume problem.
Your saying, your truck ran fine till you pulled up to the pump, added how much and was it E-85?