Questions about P0305 code
- Thread starter Gatorlaw
- Start date
Threepointsix
JK Enthusiast
Curiously watching this thread as it's always good to know how others resolve or make it through odd codes and engine issues.
Today I’m pulling the top half of the engine apart. I have a ticking from the top. Going to replace the rockers and lifters. I’m pretty sure the tick is on the right side (cylinders 1,3,5). Maybe a bad rocker lifter is causing the misfire?
Well the bad rocker was found and replaced. Identified a PCV valve that needs replaced, passenger side. Part ordered so will do that this weekend. Otherwise I’ve driven it about 50 miles since the rocker replaced. No more tick and the check engine light hasn’t returned (yet).
Threepointsix
JK Enthusiast
Thats awesome news! I love reading about owners that have success at correcting these types of issues. Especially since there seems to be less and less mechanics willing to go into actual engine repair.
Please keep us posted if anything changes. Cheers
@Shjohn62 "Also, you might find this odd, when i have mt brake fully compressed I can barely feel a vibration in the engine and when I release my brake the hesitation is obvious."
Mine is a 2014 and doing the exact same thing. Only feel it when I let off the brake, in gear, at idle. It did not even throw a cel until I played around with it in a parking lot. I'm thinking vacuum leak. I am curious did you find the cause?
Mine is a 2014 and doing the exact same thing. Only feel it when I let off the brake, in gear, at idle. It did not even throw a cel until I played around with it in a parking lot. I'm thinking vacuum leak. I am curious did you find the cause?
Last edited:
whiff
New Member
Thanks for the replies. In my instance I believe it was related to the injector #5. I had filled up the tank earlier that day and had accelerated fairly brisk to pass a car just before. My guess is some trash was causing the injector to malfunction.
I ordered some Amsoil PI and put it in and topped off the tank and the issue has not returned.
I ordered some Amsoil PI and put it in and topped off the tank and the issue has not returned.
Mike B
Member
Back a few months ago. I was on a trip from Ohio to South Carolina. Halfway across WVA my jeep started missing badly. Stopped in VA AT a AutoZone to have the read the code. Depending on what it was determined what my next move was. It was code p0305 misfire number two cylinder. I figured a bad coil. I continued my trip. Next morning tore it apart replaced plug a coil. Reassemble. Still missing. Had to replace the injector. All is good now. I did have the oil change after that also.