Hi,
This can be caused by a few different things. First, it may need a tune-up. Also, things like engine vacuum leaks, fuel pressure-related issues, or even engine compression (239,000 miles) can cause it.
The easiest things to check for are vacuum leaks.
Here is a link that explains how to locate and repair one:
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
The other things will require a bit more time to check. So, what I suggest is to have the computer scanned for diagnostic trouble codes. Most parts stores will do it free of charge. I would recommend that regardless of what is found as far as vacuum leaks. That way, if there is a code, we will have a better understanding of the possible cause.
Let me know what you find.
Take care,
Joe
Tuesday, November 1st, 2022 AT 6:35 PM