2003 Ford Explorer misfire code 304

2003 FORD EXPLORER
75,000 MILES • 6 CYL • 4WD • AUTOMATIC
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JENROSS9639
  • MEMBER
  • 1 POST
Hello. I have a misfire code 304 on my car. I have replaced the spark plug wires, ignition coil and the spark plugs 6 months ago. My mechanic is at a loss and so am I. What do I look at next?
Feb 1, 2010 at 2:18 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check the sparkplug,compression and injector on #4 cylinder.
Feb 1, 2010 at 3:39 PM
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JENROSS9639
  • MEMBER
  • 1 POST
Now I have a misfire code 316, definition is misfire in first 1000 revolutions of engine. No clue what to even look at. Any ideas?
Feb 2, 2010 at 11:30 AM
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