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  1. E

    !992 4.0 misfire/Backfire in intake

    Jeep has been running great then all of a sudden while driving it started running very rough and backfiring in the intake. Tested the fuel pressure, its where it should be both off and running (44 psi engine off and 32 psi running) and no leak down. Changed O2 sensor, cap and rotor. See no...
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