Irregular idle at start up

Hello and thanks for using 2carpros.com. Since the problem deals with the idle, I would recommend starting with a component called the idle air control valve (IAC). The IAC meters the air into the engine which maintains the idle.

Here is a description of the component:

https://www.2carpros.com/articles/how-a-idle-air-control-valve-works

Here are the directions for determining if it is actually the problem:

https://www.2carpros.com/articles/engine-idles-too-high

Additionally, here are general directions to help you in replacing the component:

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Here are the exact directions for removing and replacing the component from alldata

REMOVAL
Remove the air cleaner lid, disconnect the inlet air temperature sensor and makeup air hose.
Remove the negative battery cable.
Disconnect electrical connector from idle air control motor.
Remove idle air control motor mounting screws.
Remove idle air control motor. Ensure O-ring is removed with the motor.
INSTALLATION
The new idle air control motor has a new O-ring installed on it. If pintle measures more than 1 inch (25 mm) it must be retracted. Use the DRB AIS Motor Open/Close Test to retract the pintle (battery must be connected.)
Carefully place idle air control motor into throttle body.
Install mounting screws. Tighten screws to: 6.2 Nm (55 in. lbs.) torque.
Attach electrical connectors to idle air control motor.
Install the negative battery cable.
Install the air cleaner lid, connect the inlet air temperature sensor and makeup air hose.

Here is a general video which may help you with the process. It shows how to replace one.

https://youtu.be/JZoEb_hyWC8

And finally, I attached a picture that will help you identify the part on your vehicle. The picture is specific to your vehicle.