The first thing I would suggest is to have the computer scanned for diagnostic trouble codes. That will point us in the right direction. Otherwise, it becomes a guessing game.
Here is a quick video showing how it's done:
I realize most people don't own a scan tool. However, most parts stores will do it free of charge. If you have that done, let me know what codes are found.
As far as an O2 sensor, that certainly could be causing problems. However, so can a coolant temp sensor, fuel pressure, an engine vacuum leak, and so on. That is why I'm suggesting the scan.
One thing that you can do that won't cost money is check for a vacuum leak. Here is a link that shows how that is done:
Let me know. Also, let me know if there are any strange sounds, odors, or smoke from the exhaust.
Friday, June 25th, 2021 AT 9:56 PM