Poor idling and stalling

hi,

There are many causes that make problem as you mentioned, to narrow down the problem as a first step check the fault codes. check figure 1 below location of scan tool connector to you car.

check the link below how to read fault codes by using scan tool.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

You can visually check for any vacuum leak that can cause these problems, jumped out throttle air intake boot or idle control problem. check the figure 2 below for vacuum diagram that can help.

check the link below how to fix engine stall problem.

https://www.2carpros.com/articles/stall-at-idle

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let us know what happens with you.

Thank you.