Coil 6 Insufficient Ionization, Multiple Cylinder Misfire, Fuel Injector 4 Circut/Open

[candy11024]

2nd Tank of Cleaner, no luck.
New Sparks, no luck.... although it seemed to run a *little* smoother, and the misfire codes went away.
Only remaining codes are:
P0204 - Fuel Injector 4 Circuit/Open
P2317 - Ignition Coil 6 Secondary Circuit - Low Ionization
Still suffering from basically falling flat on it's face past 2100 RPM, and idling poorly.

My Jeep has similar issues,Does your Jeep run great when the gas light is on as soon as I put gas no runs good no more

 

[blackhawk]

P2317 - Ignition Coil 6 Secondary Circuit - Low Ionization

I was randomly dealing with this video for around 6 months but in coil 6. The issue was in the connector of that coil. The pin was a little bit open.....
I close it with a needle and solved the problem. Hope this helps

 

[david.lukac]

In my case (Coil 4) Low Ionization was caused by fault ECM/PCM - replaced with refurbished one from Flashmasters - after ruling out spark plugs, ignition coils, injectors and wiring continuity (https://www.jeepkj.com/threads/2004...ition-coil-signal-from-pcm.62460/#post-808079)