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what is "service engine" code 304?

Discussion in 'Under the Hood' started by kola, January 6, 2004.

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    1. kola

      kola Member

      December 17, 2000
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      My 98 Explorer's "service engine" light came on, and the vehicle was running rough. The Ford dealership service technician said the code is 304. I have looked at the below website but do not see a 304.

      Does anyone know at a code 304 is?



      PS: I have been told probably either have a blown head gasket or cracked head. See "Cracked head or am I being took?" thread.
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    3. Alec

      Alec Elite Moderator Moderator Emeritus

      April 25, 2000
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      City, State:
      Houston, Texas
      Year and Model:
      2008 JK
      I answered in your other thread, there was no need to start a new one.

      (misfire in cyl 4).

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