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Trouble code P0303

Discussion in '1994-2004 V6 Mustang Tech' started by Lee Cannon, Jul 9, 2017.

  1. Lee Cannon

    Lee Cannon New Member

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    Need some answers. The other day my 2003 mustang started running rough and check engine light came on. Took it to Auto Zoneand had the code read. Had code P0303 # 3 cylinder misfire. When I got home I found the spark plug cable was burned. Changed the cable with a spare, car still ran rough. Changed the spark plug, car still ran rough. Bought new wires and replaced the #3 wire, car still runs rough. Any ideas?
     
  2. six gun

    six gun Active Member

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    The final link would probably be with the coil pack, far as ignition goes. If it isn't that.. may have an internal engine problem, possibly head gasket or damaged piston or something.
     
  3. 6 Shooter

    6 Shooter Well-Known Member

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    Did you clear the code and if yes, did the code show up a second time?