About to hit 100K miles and mine still does it. It seems to get worse as the throttle bodies get dirty. But I clean them about every 25K miles and it's never gone away completely.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed | |