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Old 11-28-2009, 10:44 AM   #1
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Default Coil Pack Problems

Just wondering if there is an easy way to tell if a coil is bad or not. My truck seems to be idling a little rough and just wanted to know if there is a quick check to see if it works or not?

It could just be me but just thought i'd ask.
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Old 11-28-2009, 11:17 AM   #2
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if you had a real misfire from a coil or fuel injector the misfire monitor would 1st start to flash the service engine soon light, after it would flash it would then stay light causing a stored code in the eec system.. if this is ther case have the codes read to id the clyinder then determin the cause
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Old 11-28-2009, 01:55 PM   #3
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Ok, I figured but wasn't sure. Mine is not doing any of that. It seems to idle a little rough but it may be nothing. Thanks for the help.
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Old 11-28-2009, 02:29 PM   #4
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Ok, I figured but wasn't sure. Mine is not doing any of that. It seems to idle a little rough but it may be nothing. Thanks for the help.
Some seafoam or other quality fuel treatment might do the trick.


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Old 11-28-2009, 07:15 PM   #5
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I've replaced 2 coil packs on my truck, and the check engine light didn't go on for either of them.
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Old 11-28-2009, 08:00 PM   #6
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I've replaced 2 coil packs on my truck, and the check engine light didn't go on for either of them.

How did you know they were bad?
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Old 11-29-2009, 09:47 AM   #7
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I'll be honest, I didn't. All I knew was that my truck was idling rough and riding rough around 60 mph. It was under warranty, so I brought it back to the dealer and they told me. truck runs great now.
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Old 11-29-2009, 10:05 AM   #8
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if you had a real misfire from a coil or fuel injector the misfire monitor would 1st start to flash the service engine soon light, after it would flash it would then stay light causing a stored code in the eec system.. if this is ther case have the codes read to id the clyinder then determin the cause
I've had the similar problem the check engine light flash several time then go out ? is did the eec correct the problem .
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Old 11-29-2009, 10:27 AM   #9
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I've had the similar problem the check engine light flash several time then go out ? is did the eec correct the problem .
No, the light turns off after an hour or so of driving IF the problem did not happen again.

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Old 11-29-2009, 10:27 AM
 
 
 
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