I'd replace them immediately, you'll notice an improvement right away.
You will have improved power and fuel efficiency if you replace those plugs.
My CC is 2 years old and I have accumulated 65k miles. I changed the plugs at 60k. They looked pretty toastyso I am glad I did.
Plugs 97K on my 2010 original ones...working great (lots of highway miles). I'll be changing them at 100K.
It was the plugs all along. No wonder though, since they were extremely overdue for replacement. Checked the gap on every one i pulled out. They ranged from .037 to .048... so there must have been some severe blowby, hence the misfiring under boost.
I also suggest NGK spark plugs. And not necessarily the high-end Iridium ones. The 'lower' end ones are just as good.
I personally run 0.035" on BKR7E-IX plugs and the red 06E coils. Significant improvements to acceleration and responsiveness after the ECU adapted :thumbup:
When I got the car back from the shop I installed a wide-band O2 and changed the plugs to NGKBKR7e's (Copper) gapped to 0.028. I also re-greased the DV, since last time I had used generic grease general purpose grease, with high temp grease. The car feels a lot better now, and timing pull ranges from 3-8 under WOT. The AFR gauge shows anywhere from 12.5-13.0 under WOT, and bounces between 14.3-15.2 or so while cruising. I also believe that I hear the DV a bit more (have a cone intake), so maybe it was sticking?
yeah ive ran them.... i guess there ok but they foul faster then the iridiums...
Hey I am just wondering what are the best plugs to get for my jetta? I bought some NGK's from auto zone and I was getting misfires in EVERY cylinder.
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