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    '97 4.0 Misfiring/running rich

    Ok, I've got a problem that is annoying me. My '97 Explorer with the 4.0 OHV is misfiring at all RPM's and running rich. No DTC's, hooked up the computer and O2 sensor number 2 before the cat says it is running rich after the O2 sensor warms up. I rebuilt the top end of the motor so there are no...
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