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Old 11-29-2010, 04:36 PM
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Ignition Coil and spark plugs

How often should the ignition coil be replaced. My WJ has 220,000 miles and I have never done it since i purchased it with 85,000 miles on it.

Also, i would like to replace the spark plugs soon. I dont want anything fancy nor dirt cheap but some decent plugs. Any suggestions as to what brand/model?
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Old 11-29-2010, 06:46 PM
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Re: Ignition Coil and spark plugs

Ignition coil normally only has to be replaced as soon as it doesn´t function anymore.
Regarding plugs, seems that Jeeps run the best on the standard plugs. The type should be mentioned on an identification plate under the hood
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Old 11-30-2010, 02:24 AM
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Re: Ignition Coil and spark plugs

I use NGK spark plugs recently replaced them and the ones i replaced were from the last owner were also ngks... they work fine from what i can tell
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Old 11-30-2010, 09:11 AM
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Re: Ignition Coil and spark plugs

I replaced a set of NGK platinum tips that previous owner installed about 25,000 kms ago with the OE Champion Coppers. Seemed to smooth out slightly, a bit of a flutter at idle. Although I do need to look into that further, the coppers seemed to help a little. As far as mileage and power goes, I didn't notice a difference.
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