Misfire Advice
Hi all. 2012 Jeep Liberty Jet that just hit 235k miles. I use the JScan app everyday on my 50min commute. I've had 0 misfire counts on every cylinder until this Tuesday. On start, cylinder 2 started hitting 60+ on the count. Mild rumble then smooths out a few seconds later. Count doesn't increase while driving, doesn't increase at a stop light for any of the cylinders. No smell, no white exhaust fumes, no stumbling driving or any other irregularities. I already had an appointment for tire rotations tomorrow and now having them take a look. Code P0302.
All spark plugs, coil packs changed a month or so ago. New wires, new battery, new throttle body, map sensor, coolant flush, purge valve. Oil change every 3000 miles or less. Coolant level is stable
Fuel injectors have not been changed. Any advice for self diagnosis is appreciated