The lack of a MIL/CEL isn't conclusive, because codes can store before the algorithm reaches the point that it triggers the MIL.

Bottom line: The first step with a drivability issue is to check for codes.

You're in CA, so you can't just run by an auto parts store, but you can order a basic stand-alone code reader from amazon for under $20. It will read and clear OBD-II codes, which in many cases is all you need. Amazon.com: Autel MaxiScan MS300 CAN Diagnostic Scan Tool for OBDII Vehicles: Automotive

Until you read codes, you'll still be wandering around in a cave without a flashlight.

Good luck.