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  1. M

    4.0 fuel pressure?

    I need to get a fuel pressure regulator with boost reference. But I have to find the right one. Does anyone know the factory fuel pressure for an '03 4.0?
  2. M

    Custom Turbo Setup

    Hey Everyone. I own an '03 TJ with a 4.0. I am currently planning out a custom turbo setup, Intercooled, alcohol injection running about 5psi. I have very little experienced with this year's fuel system. My last jeep was a '99. I am curious if anyone has any advice for a turbo on an '03, If...
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