I plan on doing a tune up to my 2005 jeep grand Cherokee 5.7 hemi. My question is do I have to switch out the coil packs?
Brian & Stewy in 2016!
Not unless there is a problem with one. Be careful with the boots, too. When you put it back together sparingly use a little white lithium grease to lube the boots when you put the packs back in place.
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