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Old 12-26-2018, 01:38 PM   #1
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Oil in coil pack

Code P0302 - misfire cylinder #2. Changed spark plugs, wires tested okay and coil pack tested okay (primaries .7 ohms and secondaries 9.5k ohms). There was an oily substance in the coil pack where the wires plug in but not motor oil. Is this normal?


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Old 12-26-2018, 05:34 PM   #2
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The "oily substance" may be silicone grease. Completely normal for that as it helps keep the connections dry.

Check the coil pack for cracks that often indicate a failing/failed coil pack.

If motor oil is found around spark plugs, that is often a leaking valve cover gasket.
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Old 12-26-2018, 10:56 PM   #3
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X2..........dielectric ignition grease. Those coils are dry, there is no oil in them like bigger ones have.
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Old 12-28-2018, 01:59 PM   #4
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Thanks for the responses. The spark plug wires have the numbers on them. Does this indicate they are original? That would mean many miles and years of use.

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Old 12-28-2018, 10:08 PM   #5
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Likely and they deteriorate the more times they get yanked to check stuff. The conductor inside is string with carbon impregnating it. Quick check of good is ohms per FOOT OF LENGTH, at 5000 ohms or less wire is good, over is bad.

Some plug wire sets DO number the wires like OEM...........
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Old 12-29-2018, 02:53 PM   #6
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Took the coil pack off today. It does have some cracks in it, so a new one has been ordered. Found some squirrel turds also, hope he didn't chew any of my wires.
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