Mechanics

WHAT COULD BE WRONG IF SPARK PLUGS BURN RED AND THEN BURN OUT AND CAR MISSES ON PULL IN 5.4L ENGINE

2007 Ford Expedition • 10,300 miles

Spark plugs have been replaced three times and coil pack replaced once. Only misses in a pull
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Frostgang
April 24, 2012.




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

ASEMaster6371
Apr 24, 2012.


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