Hello all,

I have a 2003 XC70 with 240K on it. I recently got a CEL for ECM-3503 & 3533 Misfire cylinder3 - start up . Changed all the plugs and replaced that coil pack still getting those codes.. I just pulled that plug again after it has idled for about 10mins and it is noticeably black with a little sticky oil on it compared to another plug. I just need one little fitting to test the compression so will do that next. Just wanted to see what ya'll might think at this point?

Can you not insert photos on here?

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