Replaced coil, plugs, wires on 2004 to clear p2305, p0300, still ran rough at first.

Question

2004 Grand Caravan flashing CEL, had codes read: ignition coil secondary circuit, random misfires. Replaced ignition coil, still ran rough, intermittent flash CEL. Replaced wires, same. Replaced plugs, same. Hours from home so we were forced to drive it. Ran rough, CEL on (not flashing) for quite a while. After some stops we noticed seemed to be running okay. Then by the next day the CEL went off. I assume it took a few drive cycles to clear the light, but why did it still run rough after the new parts? Was the ECM still compensating for the bad coil/plugs/wires? Did it need to relearn? I'm worried I can't trust it until I know what happened.

Answer 1

P0300 Random misfire

P2305 Secondary circuit insufficient ionization

Bad fuel? When P2305 occurs this is more with the sparkplug , such as a loose sparkplug, or improperly seated sparkplug wire,If those area are good, Water in the fuel can also cause this type of condition...