Just been for a mini rolling road day with a few mates. My APR stage 1 S3 made 287bhp, one issue needs sorting then they thought it would make over 300bhp.
Misfire at around 5800rpm need new spark plugs I think. See the printout:
Manual, it's 63k last serviced at 57k. I didn't try to change the spark plugs, but I'm pretty sure that's the cause of the problem as they haven't been changed for a long time now. I was meaning to get some new ones this week but I've had flu
What's the opinions on the NGK one step colder plugs vs OEMs? Are the benefits worthwhile?
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