Hotter Spark Plugs

Electrical and Ignition

  1. dICKj

    dICKj Well-Known Member

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    Can l go to a hotter plug if my plugs are all blackened.
     
  2. TT5.9mag

    TT5.9mag Two atmospheres are better than one

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    You can but before you do you should figure out what exactly is blackening them or the new plugs will look the same.

    Blackened from what? Take some pics.
     
    • Agree Agree x 2
    • toolmanmike

      toolmanmike Moderator Staff Member FABO Gold Member

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      Probably not because they are a heat range too cold. Possibly choke staying on, carb bleeding over due to too much fuel pressure or a bad needle and seat and/or float with a hole in it. Holley carbs with a blown power valve can run rich as well. A slim chance you could have a bad coil. Slim possibility.
       
    • 67Dart273

      67Dart273 FABO Gold Member FABO Gold Member

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      ............Or you checked them before they had time to normalize or the engine cooling system has a problem and is running under temperature
       
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