backfiring through intake

Discussion in 'Engine, Fuel and Exhaust' started by theglide, Apr 27, 2015.

  1. theglide

    theglide Member

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    I have an 06 softail runs fine for first 20 to 30 seconds then starts to backfire through intake. unplug map sensor idles fine but brakes up at higher rpm's did compression test has 125 lbs both cylinders. replaced plugs,wires,airfilter,fuel filter cam chain tensioners are good.
     
  2. Jeff Klarich

    Jeff Klarich Well-Known Member Contributor

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    Have you checked for air leaks?
     
  3. theglide

    theglide Member

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    yes and I put new O-rings on intake
     
  4. Jeff Klarich

    Jeff Klarich Well-Known Member Contributor

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    Maybe a little more info like what mods if any, how long have you had this issue. The more info you can supply may help with the diagnosis.
     
  5. theglide

    theglide Member

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    it has screaming eagle slip on and a k&N filter everything else is stock it started like 3 weeks ago it sat for a month before that
     
  6. Jeff Klarich

    Jeff Klarich Well-Known Member Contributor

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    I once had a coil give me similar symptoms as you described.
     
  7. Jack Klarich

    Jack Klarich Expert Member

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  8. lesr389

    lesr389 Member

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    Mine is doing the same thing. I think my carb needs to be rebuilt. But im taking it to a really great mechanic on saturday for a full inspection. Ill let you know the results.
     
  9. Spade5

    Spade5 Active Member

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    Bad fuel?
     
  10. lesr389

    lesr389 Member

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    Ive used sea foam too...and the hasnt made a difference