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Bad gasoline will cause the 460 motor in my 1982 E350 to vapor lock on a hot day. I don't buy gas at super cheap off-brand stations to avoid this but once in a while I will get tankful that makes the van run terribly and sometimes vapor lock. Adding octane booster or Heet water remover to the gas usually helps to burn more smoothly through the bad tankful.

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14y ago
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Q: How do you fix vapor locking on a 1989 ford E350?
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