old gasoline, poor performance

Asked by Steve Dec 26, 2016 at 05:38 PM about the 1991 Ford F-150 XLT Lariat 4WD SB

Question type: Maintenance & Repair

Baby is sick. 1991 Ford XLT, automatic transmission, V8 engine, 4 wheel drive,
80,000 miles on engine.  I had 10 gal  treated 1-year-old gas in in each of the
two tanks and added 7 gallons in each tank to top it off.  As soon I pulled out
of the gas station I could not get the speed beyond 40 mph.  I can't afford a
tear down so:  Toulene? Valve treatment? ATF or Miracle oil in the engine oil?

1 Answer
73,480

OJ answered 7 years ago

As Js indicated condensation in the tank can be a problem. It happens a lot, especially with fuel which has ethanol added.

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