I’ve got a random misfire on cylinder 4 po304 and p2311. Replaces plugs and coil packs . Also checked for wiring issues to no avail. I do have a tick and wondering can bad rocker arms cause the p23111 insufficient ionization??

 

2311 is Ignition Coil D (cylinder 4) secondary circuit.... Try swapping coils on 4 and 6. See if the misfire moves with the coil.

 

tried all that. I do have a p1DCF code that is : TCM monitoring processor performance- unallowed park engagement due to ABS failure.

My breaks work great and I can’t figure this out. IT’s running good right now but randomly acts up while driving then throwing the same po304 and p2311 codes??!,?

 

So in the interest of not suggesting more stuff that you already tried, what all have you done to troubleshoot this problem?

 

Have replaced coil pack, spark plugs, even the PCM! , checked for broken wires or connectors ( still checking for those ) , replaced plenum gaskets, replaced EGR valve , replaced one front wheel speed sensor ( it was good but I replaced it anyway ). ..

 

Is the misfire consistent? Or is it intermittent?

 

Also, no smoke or exhaust smell. It’s an intermittent misfire on the same number 4 cylinder. I can be driving down the rod then all of a sudden car looses power and shakes ( the misfire). I can usually stop and restart my car a few times and it will be ok again for another 10-20 miles. I’m baffled

 

One more thing, I just did a scan and I also have codes for open or shorted speakers and hands-free communication error. The amp and Bluetooth module appear to be hooked side by side under the knee panel dash ( steering wheel) all these wires look like they are all bunched together going through the dash to the PCM. I shined a light on them and could see specs of shiny wire for possible breaks. Could this be my short ????

 

Since you have replaced the coil, and PCM, that's gotta be a wiring issue. The other problems cropping up kinda reinforces that.

 

That’s what I’m thinking now.. going to keep looking and about to take the panel off under the steering column and inspect all those wires thoroughly. I’ll reply back here afterwards and hopefully that’s it then.