Last night I stopped to get gas on the first leg of my road trip from Northern California to Big Sky Montana.
Car was running just fine before stopping to get gas.
After getting gas, within about 1 mile of driving, I suddenly had a loss of power and multiple misfires.
Ran the OBD-II codes and I have the following:
P0300 - Random/Multiple Cylinder Misfire Detected
P0301 - Cylinder 1 Misfire Detected
P0302 - Cylinder 2 Misfire Detected
P0303 - Cylinder 3 Misfire Detected
P0304 - Cylinder 3 Misfire Detected
P0305 - Cylinder 5 Misfire Detected
P0140 - O2 Sensor No Activity Detected Bank 1 Sensor 2 (I believe this is for the downstream O2 sensor)
So, my codes are pointing to multiple misfires, and not much else. I believe the P0140 is a result of the misfires, and not something that can cause misfires.
What do you guys think the problem is?
My suspicion, as hesitant as I am, is to say "bad gas". It seems awfully coincidental to have multiple misfires immediately after filling up.
I was able to limp the car the remaining 60 miles to finish last nights leg of the trip. I filled up with 91 octane as I arrived to my destination. It might have improved the situation a bit, but the car is definitely still running very rough. Multiple misfires.
My plan for today is to keep driving towards Montana, and add brand name 91-octane to the tank as I continue to burn off my existing fuel. I'll likely add some fuel injector cleaner to the fuel tank while I'm at it.
Any other suggestions?