I pulled the plugs and replaced. Passenger side plugs were dry and old looking. Drivers side were a little normal and a couple were some oily.
Replaced. Seemed to be no change. Car will start and run. At idle speed very rough. If I rev up at higher rpm's smooths out in driveway.
I am assuming next step is 02 sensor. However I am not sure where to start. Should I buy one or can I simply unplug to test? Any advice?