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Ever since i hade new VVT cam gear + ECU flash, whenever the car is cold the idle drops when im going for a complete stop (not everytime, quite random), only when cold though. Goes down to about 500rpm and the car just shudder for like 0.1sec and then bounces upto 700rpm (roughly) and stays there. Also the car "vibrates" more when just standing still and idling than it does when it's fully warmed up.
When the car is warmed up it got rock solid idle and never drops when going for a stop.
Anyone else experienced this?
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