Question about 2003 Lincoln Navigator
Had the same problem, if it sputters/jerks around 50-60MPH with your foot slightly on the accelerator, replace all 8 COPs(Ignition coil over plug) and sparkplugs....It will get worst and end up ditching you!! NOTE: Make sure if you replace the sparkplugs, that the you or your mechanic works on the motor COLD and are very careful removing and replacing them. These 5.4L on 97-04 models are known for very little plug threading, therefore ejecting the plug out of the motor. This will result in major engine damage. Hopefully this helps
Posted on Jul 22, 2009
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Posted on Jan 02, 2017
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