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<blockquote data-quote="rvseverson" data-source="post: 20791" data-attributes="member: 4797"><p>I replaced my spark plugs at 90K and again at 180K.&nbsp; Used the original 41-108's both times.&nbsp; Well 2 months later I'm getting Cyl3 misfire.&nbsp; should have swapped coils around first but after 9 years and 187K miles just went for new set of coils.&nbsp;&nbsp; Seemed to run better but I could feel it bucking slightly.&nbsp; Assuming good spark plugs and coils I started looking at other stuff.&nbsp; But I wanted to be sure that the new coils were good so I reinstalled the old 1,2 &amp; 4 coils and a new coil in Cyl3.&nbsp;&nbsp; I was still getting cyl3 misfire code so I swapped coil 3 &amp; 4 and the misfire stayed on cyl3.&nbsp;&nbsp; Pulled the spark plug and the tip was gone!&nbsp; Pull the other plugs and they are all gone too.&nbsp; So what happened to them?&nbsp; BTW I bought these off EBay.&nbsp; They were in AC Delco boxes and labels?&nbsp; Going to go to NAPA tomorrow to buy AC Delco 41-108's</p></blockquote><p></p>

[QUOTE="rvseverson, post: 20791, member: 4797"] I replaced my spark plugs at 90K and again at 180K. Used the original 41-108's both times. Well 2 months later I'm getting Cyl3 misfire. should have swapped coils around first but after 9 years and 187K miles just went for new set of coils. Seemed to run better but I could feel it bucking slightly. Assuming good spark plugs and coils I started looking at other stuff. But I wanted to be sure that the new coils were good so I reinstalled the old 1,2 & 4 coils and a new coil in Cyl3. I was still getting cyl3 misfire code so I swapped coil 3 & 4 and the misfire stayed on cyl3. Pulled the spark plug and the tip was gone! Pull the other plugs and they are all gone too. So what happened to them? BTW I bought these off EBay. They were in AC Delco boxes and labels? Going to go to NAPA tomorrow to buy AC Delco 41-108's [/QUOTE]

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