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  1. MartinZ28

    Engine running rough

    I have the front o2 sensors plugged into the headers, i just have no cats. or the o2 sensors that go to them. fuel mileage is trash but always has been i can usually get 250 miles on a full tank.
  2. MartinZ28

    Engine running rough

    I own a 1997 chevy 1500 with a 5.7 i have had this issue for a month now. The truck starts up fine and drives around fine in parking lots, when i get on to a mine road it hesitates and has no power. When i do give more gas it backfires a few times and i let off. When i smash the gas it hesitates...
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