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Coil problems

Old Mar 2, 2007 | 12:06 PM
  #1  
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ford-m
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Coil problems

This is the forth coil I have had to replace.
Four in my 2001 4x4 F150 4.6 and one in my wifes Lincoln
To-day I ran into a large puddle (flooding) and it started from there. I recognize the symtoms of a shot coil. It seems moisture is a result everytime.
Macahanic tells me its a poor design on the seal of the boot.
Any ideas. I have all of them is there a way to test them.

Cheers
Michael
 
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Old Mar 4, 2007 | 02:42 PM
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Are you using motorcraft replacements? You might try using an MSD or jacobs in thier place. Usually aftermarkets will upgrade the stocks deffiencies.
 
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Old Mar 4, 2007 | 03:45 PM
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You need to replace your boots on the rest of the coils. They are the cause of your problems. When they get old they crack & allow the spark to short out to the head.Use plenty of dielectric grease on them too
 
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Old Mar 5, 2007 | 10:33 AM
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Today on my way to school my 02 5.4 started missfiring on #4 cylinder, im wondering if I have the same problem. We just got 18 inches of snow and I have been going through it up to my doors for three days in a row. I was thinking it may be a coil and it is highly likely that it got wet from the snow, does this make sense.
 
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Old Mar 5, 2007 | 12:57 PM
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Does it sound worse at lower RPM and gets smoother at 25-3000 Rpm
If so I would bet the same
 
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Old Mar 5, 2007 | 06:36 PM
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Yep, highly likely.
 
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Old Mar 6, 2007 | 10:44 AM
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Well my dad told me to leave it with the mechanic here in town but im sure that was the problem. I guess i'll let him deal with it though
 
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