Poor drivability—or a hesitation on acceleration—after starting the engine when it's cold can be fixed by a simple reprogramming of the powertrain computer.
Car Problem Reports
Kia Amanti Reprogram Computer to Fix Poor Drivability/Hesitation After Cold Start
Kia Amanti Problem
Engine Affected: 3.5L V6
Average Mileage: 37,500 mi (35,000 mi - 40,000 mi)
Visitor, 2005 Kia Amanti, 3.5L V6, 35,000 mi
My Wife has had this problem as well when the weather is cold.