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Truck runs better on quarter tank.?

I have a 1998 Ford F-150 4.6 v8. It runs just fine but noticed when it s at quarter tank of gas it seems to have more horsepower thought if it at full tank it s supposed to run stronger. Only upgrades to the truck is cold air specter intake and glass pack muffler. Why would it run stronger on low fuel?

2 Answers

Relevance
  • 4 years ago

    Fuel quantity makes no difference to performance other than a lower fuel level is lighter

  • ?
    Lv 7
    4 years ago

    It's lighter, that's the only difference.

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