2015 Chrysler 300 V6. So this started out as having a misfire on cylinder 2. I went ahead and changed plugs, coils and injectors as it was about 170k anyways. I also changed out MAF sensor. Still having an issue so I took it into dealership to have it diagnosed. They called me 3 hours later and had hydro-locked my motor and took no responsibility for it. I then bought a new crate motor and put it in. Weird as it is, it still had the same problem. Keep in mind that it was a long block with new heads (so not a head problem). It had a new PCM and both wiring harness replaced and yes still has an issue at number 2. Everything has been checked and functioning as it should with the exception of running right. Also, another weird thing is that if you shut off another cylinder the whole motor will cut off. PLEASE help, I have about 8-10k wrapped in this and still cannot use it.

 

Hi are you still having this problem ? If you are let me know I might be able to help I had the same problem I ended up pulling No 11 fuse from front fuse box then turn ignition on for ten seconds do not Try to start turn ignition back off replace the fuse use an obd2 scan tool to erase any codes left in the ecu then put key into ignition don't turn wait 10 seconds turn to second position wait 10 seconds turn off then turn to ignition on for 10 seconds then turn off remove key wait ten seconds replace key turn to ignition on wait 15 seconds it should beep then start your car hopefully that will solve your problem

 

Yes still has not been fixed. The number 11 fuse shows for the horn. Is that the one you are referring to? I will definitely try this. Let me know if thats the right fuse.

 

Fuse 11 should be the ecu fuse on some models it's fuse 2 once you find the fuse for the ecu on your car follow the same key procedure that should help reset the electric controls for the car also worth checking the o2 sensor after the cat incase one has blown heating element causes the same problem

 

Did your suggestion. Although I could not get the beep at end of reset cycle and I tried many different ways. Did all 4 O2's and still nothing. Appreciate your time but this is just insane. Everyone including techs that have looked at this have no answer. Almost every single part is new and still misfire in #2. It just throws a general misfire code with no real code to check out.