2003 2.4 Non-Turbo, getting persistent error P2305 Ignition Coil B Secondary Circuit.

Replaced Plugs
Replaced IGN Wires
Replaced Coil
Checked connections to coil, checked for bent or broken wires, bad pins, cleaned.
Swapped ASD Relay
Checked ground to engine

​​​​​​​When you start the vehicle it is fine, after running for about 10 mins, it feels like there is a misfire on one or more cylinders, only getting the code above, no other code present. Not even the P30x misfire code. The issue doesn't appear until you drive, few miles then the misfires, turn the car off and start it up, runs fine for a little while. Few minutes then back again.

Any ideas other than an issue with the PCM?

I read several posts and even swapped in a new Crank Pos Sensor but same issue.

​​​​​​​Any feedback is greatly appreciated.

 

Fuel injector problem? Try a can of fuel injector cleaner. Doesn't cost much, can't hurt, might help.