Most times the random misfire code comes up when the engine has a basic tune up issue. From most to least likely:
Tune up
You locate the cause of the random misfire and take corrective actions against that; be it a coil, plug, wire, coil boot or crank sensor. A random misfire is as it states - a misfire that happens randomly in possibly a random cylinder as well. They can be hard to diagnose, as well and it is recommended that you take vehicle to a qualified, ASE certified shop for diagnostics.
You may need a new Random Misfire Solenoid P1300!
How do u fix a misfire
Trouble code P0301 means: Cylinder 1 Misfire Detected
po 302 is not a valid code but maybe misfire code number 2 cylinder
p0302 is cylinder 2 misfire, you need to fix the cause of the misfire. Possible causes are plugs, coils, injectors......
Replace your plugs and wires. Just happened on mine at 118000
Misfire on cylinder #3, not sure of the cause (no spark, blown gasket, injector problem).
misfire,monitor,malfunction
P0303, cylinder #3 misfire. Check plug, wire, coil, etc.
Code P0304 on 2000 Ford Ranger is: Misfire at cylinder 4 detected. May be cause by a bad spark plug.