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Originally Posted by 2000mudder
i have a 2000 4x4 with crappy milleage also. it used to get about 15 or 16. now i can't get over 10. it has 33" mudders on it so the odometer is slow so it's prob getting 12 instead of 10. i tried fuel injec cleaner, new plugs and wires, different gas, you name it. even bought k&n cold air kit. no check engine light and it runs smooth. even put synthetic fluids in everything. i'm stumped with the crappy milleage thing too!!!
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Does the 2000 have a vacuum operated fuel pressure regulator? Never been under the hood of one...
Pete