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Q:

96 ranger 4 cyl ran fine till put ethonol gas in now won't run on 1996 Ford Ranger

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sputters, backfires, doesn't die but won't accelerate. replaced fuel filter and put non ethanol gas in. no improvement
(2) Answers
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.