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Backfiring on downshift

Discussion in 'Wrangler YJ (1986-1995)' started by Johnheard361, Jun 1, 2019.

  1. Jun 1, 2019 at 8:46 AM
    #1
    Johnheard361

    #1
    Johnheard361 [OP] New Member

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    Have a 95 jeep with 2.5 and when I downshift, I have suddenly gotten a backfire when I do. Sounds like glass packs exhaust almost. New plugs, wires, rotor and cap....no change
     
    Johnheard361, Jun 1, 2019
    #1
  2. Jun 1, 2019 at 9:39 AM
    #2
    aggrex

    #2
    aggrex Well-Known Member

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    DE
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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    Welcome @Johnheard361 back in the carb days over rich fuel mix was culprit and/or advanced timing. Hang on for some other areas to inspect to pinpoint the problem.
     
    aggrex, Jun 1, 2019
    #2
  3. Jun 1, 2019 at 12:10 PM
    #3
    Awrench

    #3
    Awrench Well-Known Member

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    check for codes.
    Any exhaust leaks?
    Check for vacuum leaks.
     
    Awrench, Jun 1, 2019
    #3
  4. Jun 1, 2019 at 12:15 PM
    #4
    TJ_abuser

    #4
    TJ_abuser Well-Known Member

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    Todd
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    2005 jeep unlimited
    2 inch lift, bumper and winch 33" mud claw
    Advance timing was usually the culprit back in the day of carburetors
     
    TJ_abuser, Jun 1, 2019
    #4
  5. Jun 1, 2019 at 3:40 PM
    #5
    boondoc89

    #5
    boondoc89 Well-Known Member

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    alex
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    3 inch zone lift. Fox 2.0 shocks. 35 inch nitto ridge grapplers. Bushwacker flat fenders. No name steel bumpers front and back for now.
    Beat me to the exhaust leaks. I bet that's what it is
     
    boondoc89, Jun 1, 2019
    #5
  6. Feb 28, 2020 at 8:16 AM
    #6
    Ron_48

    #6
    Ron_48 New Member

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    91 yj soft top with half doors
    Make sure plug wires match fireing order. and #1 plug wire is on #1 distributor cap. Good luck
     
    Ron_48, Feb 28, 2020
    #6
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