Did you have the intake removed to access the starter? If so, and I believe it's required, my first suspect is you created a vacuum leak at some point, or the manifold is leaking.
By chance, do you have a live data scan tool? If you do, let me know what the short-term fuel trims are once the engine reaches operating temperature.
If you don't, check all vacuum hoses and if the intake is leaking.
Here is a link that explains how it's done:
Let me know. Also, let me know what codes are present.
Tuesday, January 24th, 2023 AT 2:21 PM