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Recent content by mtnpruitts

  1. M

    Mercury Mariner 200 Magnum EFI

    I have lost the ground to my electric fuel pump. It is supplied from the EFI unit and is the #2 wire in the harness. I have tapped into the wire inside the unit to eliminate a bad connection or broken wire. Is the EFI unit bad or is it a sensor some where? If it is the unit itself, what went...
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