Have you notice if the security light is ON when the hard start problem is occurring? If the light is ON, it means that the ECM is not recognizing the key, or something may be interfering with the system. Have your dealer check for codes in the ECM.
Another problem could be the fuel pump. The fuel pump supposes to hold pressure, when the engine is turn off, for the next start. If there is a leak in the system, the pump will loose the pressure and it will require a few cranks to build that pressure again. Have your dealer check for fuel pressure leaks.
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