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Runs crappy cold, then zooms when warm...carb icing!

Discussion in 'XJ Technical Chat' started by luna3, Aug 7, 2006.

  1. luna3

    luna3 Member

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    I've seen other posts about this problem, but yesterday was the worst for me. Choke on, hit the button, bike starts right up and idles fine. Get under way and she bogs. Have to massage the choke enrichener to keep thing going but the bike runs terrible. After about 5 minutes though, when all warmed up, she runs great. Hmmm.

    Asked a buddy what he thought. And his answer? carb icing. That's right, icing, even in the heat of summer. Well, this is new to me. So, some browsing on the web and new knowledge about carbs. The humidity has been awful and the air is full of moisture. That air gets drawn into the carbs and the water get vaporized along with the gas. But the pressure differential at the venturi and heat loss cause the water vapor to freeze, the slide stick, and you compensate by running full choke until the carbs are warmed up by the heat of the engine, and viola, the thing now runs fine.

    Carb warmers, bs, thoughts and comments please!

    Joe
     
  2. navyjuice

    navyjuice Member

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    Try some Sea-Foam, claims to lower / eliminate moisture in the fuel system.
     

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