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zx9r420
zx9r420 asked in Cars & TransportationCar MakesJeep · 1 decade ago

i need help with 1994 zj?

my jeep is running relly rough loss of power below 2000 rpms relly crappy fuel mileage its a 4.0 liter 6 cylinder changed fuel injectors made no difference

2 Answers

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  • Albert F
    Lv 5
    1 decade ago
    Favorite Answer

    Do a fuel pressure test, its probably a fuel filter or clogged pick-up in the tank.

  • rick b
    Lv 7
    1 decade ago

    Clean the throttle body, change the O2 sensors, change out the fuel pump if the truck is over 100K

    Source(s): Old Mechanic
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