1991 Ranger 4.0 Rough Idle/Backfire Issue

Discussion in '1989 - 1992 Ford Ranger' started by Greg, Dec 17, 2017.

  1. Greg

    Greg New Member

    Hey everyone, I’m pretty new here so if this is the wrong place for this you have my apologies.

    It’s got a rough idle, runs good under acceleration, but if you shift too quick and give it throttle it will back fire. However, down shifting, it will take off and run fine.

    Any thoughts? Appreciate any input here, thanks in advance.

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