Spark plugs burn red

Tiny
FROSTGANG
  • 2007 FORD EXPEDITION
  • 10,300 MILES

What could be wrong if spark plugs burn red and then burn out and car misses on pull in ford expedition 2007 5.4L engine spark plugs have been replaced three times and coil pack replaced once. Only misses in a pull

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Tuesday, April 24th, 2012 AT 2:11 AM

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Tiny
ASEMASTER6371
  • EXPERT
  • 25,554 POSTS

They could be running too lean causing the overheating of the plugs. Get a shop to monitor fuel delivery and the injector on times as well as the short and long term trims.

Roy

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Tuesday, April 24th, 2012 AT 2:15 AM

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