What are the reconditions for spark plug gaps for a 620s using factory supplied NGKB9EFS. Seen comments. from 0.60 to 1.3 ! Any advice out there cheers in advance
Just bought a new620s. What a machine. But at idle the engine hunts from 1000 rpm to 1600. Is this normal on a620 ? Can anyone advise. Never had the issue on my previous cars