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If I am questioning whether or not my PCM is faulty, can I swap PCM's with my friend to see if mine is faulty or not? I have a 2014 Wrangler Unlimited and he has a 2018 Wrangler Unlimited. Are the two PCM's compatible? Any feedback will be appreciated!! S. Johnson

Can you swap out a 2018 wrangler PCM to a 2014 wrangler to check on issues you are having?

I failed to mention that I just came back from a 500 mile trip and my fuel economy wasn't affected at all.

Update on my Wrangler problem. I've now changed the plug, coil, fuel injector, and bank 1 O2 sensor with quality parts and I'm still getting a code of P0305. Obvious slight vibration is only felt when I let up on my brake pedal. With the brake full compressed I don't feel it. I've also...

What about NGK?

Are Champion spark plugs considered to be OEM parts?

Thanks BLACKJKU!!! I'll check my mounts.

Just researched that recall. It's for the 2012 engine. Mine is a 2014.

Guys thank so much for taking time to respond. Well, I changed the injector on cylinder 5 and the light still comes on but doesn't show code P0305. I'm confused to say the least. Also, you might find this odd, when i have mt brake fully compressed I can barely feel a vibration in the engine...

Wrangler 2014 unlimited JK. Code P0305 misfired cylinder 5. In the process of addressing this problem I've learned a few things. As of now I have replaced all spark plugs and all coils. Also ran a concentrated amount of Sea Foam through the injectors. Thought for a short while I had the...

I've now changed all the plugs and coils and I still get the P0305 code. Any further advice? Fuel injectors? Thoughts?

Thanks so much for your feedback. I'm learning daily. I'm on it asap. Have a great day!!!

Hi!!! I'm new to this forum. Received a code P0305. Misfire cylinder 5. My 2014 Wrangler Unlimited has 108,000 miles. Since I had to take the manifold off to deal with cylinder 5 I decided to just go ahead and change out cylinder 4,5,&6 plugs and coils. OEM parts. All went well in the...