Misfiring on cylinders 3,4,7,8
03-23-2018, 02:13 PM
#11
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Just basically did a visual inspection of the coils that I was putting back on. all except for one were very clean and the one that wasn't had a little bit of corrosion on the end. That one with corrosion wasn't throwing any codes though. All 8 coils received new di-electric grease when I reinstalled them
03-23-2018, 02:22 PM
#12
I wonder if there is something PCM related going on.
03-23-2018, 02:29 PM
#13
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Could the dielectric grease cause misfires if it comes in contact with a certain part of the coil? I seem to recall reading something about that recently. I could be wrong, I don't know much about the coils
03-23-2018, 02:32 PM
#14
It can if you drown the end of the boot and plug in it. It's not conductive
03-23-2018, 02:46 PM
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03-23-2018, 02:59 PM
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03-23-2018, 03:14 PM
#17
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They are very picky, little dirt on the plug ceramic, little dielectric grease between plug and spring, little moisture inside the boot, when doing the plugs, coils, and boots/springs it is very important to keep everything clean. Just the tiniest little thing can throw off the spark. If you used a good amount of grease on all of them I would pull all the boots and springs off. Clean them up very well and try to reapply. Personally I put a little grease inside the bottom of the boot and smear it around on the inside of the boot before I put the boot back on the spring then I even wipe the end of the spring clean before installing. I also clean the contact point between the spring and coil with electrical contact cleaner then put a little grease on the coil only where the boot makes contact.
03-23-2018, 04:03 PM
#18
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They are very picky, little dirt on the plug ceramic, little dielectric grease between plug and spring, little moisture inside the boot, when doing the plugs, coils, and boots/springs it is very important to keep everything clean. Just the tiniest little thing can throw off the spark. If you used a good amount of grease on all of them I would pull all the boots and springs off. Clean them up very well and try to reapply. Personally I put a little grease inside the bottom of the boot and smear it around on the inside of the boot before I put the boot back on the spring then I even wipe the end of the spring clean before installing. I also clean the contact point between the spring and coil with electrical contact cleaner then put a little grease on the coil only where the boot makes contact.
03-23-2018, 04:41 PM
#19
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It is suspicious. Thats why I suggest cleaning all the boots and spring at minimal to no cost before you throw money at it.
03-23-2018, 05:05 PM
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