intermittent cylinder 2 misfire

97 cherokee 4.0liter. Got a cylinder 2 misfire, bank 1 sensor 1 o2 high voltage(rich) and battery temp low check engine codes coming on. Only misfires after warming up, then it stutters at idle and makes a small backfire sound then runs fine. 'Inda confused on this one. On a obd 2 computer, o2 sensor 1 has slow reaction time, but would that cause a single cylinder misfire? Its got new spark plugs, wire, and distributor. Thanks in advance.

One way to find out is to fix the O2 sensor problem. Sounds like you have a bad ground(s), and possibly a short in the O2 sensor wiring harness area wires! Check to see if the wires got damaged, by getting too close the the front drive shaft or Exhaust manifold. Ohms Test and clean all the grounds under the hood, battery, block, firewall, frame, sensors and battery.

Then once that is all verfied and done,check for 12 volts to the O2 sensor on one of the 4 wires, it feeds the heater in the O2 sensor, and test that connection on the sensor for about 8 ohms to ground, to verify the heater in the sensor is still good.

Once that is done (good grounds, and 12 volts to the O2 sensor heater), if the O2 sensor is slow (OBD-II...) then replace the O2 sensor.

Then if you still have a cyl #2 misfire, look at the spark plug (hell look at it now, see if there is a problem, oil, antifreeze.....carbon...), but the O2 sensor must be fixed and working first.