Thanks! GS = spark plug gap? If so, I noticed they were over the specs for the old ones. A note that I'm sure has been often used, gap your plugs! The ones I ordered (NGK VPower 6962) came with the Denso coil kit I bought from eEuro parts. They were claimed to be pre-gapped to specs (.028 is what I ...

After some bad misfiring and the engine light coming on, then blinking, on a drive home from a ways off, I swung my '04 xc70 by the store to read the OBD code. A few plugs and coils needed to be changed, so I did all five. Not a mechanic, by any means. My father in law was, however. Changed a set of...