About a week ago my wife's car (2010 journey FWD 3.5 V6) set DTC P0350 Cylinder 5 misfire. I tried the simple fix, the coil pack and the spark plug. This did nothing. So now that taking off the intake manifold is easy, I have tried a few other things.
Things I have attempted for repair:
-sea foam engine treatment through vacuum line
-sea foam top engine cleaner through throttle body
-mopar combustion chamber cleaner through throttle body
so far no success with this!!
So today I did a compression test cylinder 5 was 60-70psi the others was 190psi. Alldata states minimum of 100 psi and all cylinders within 25% of each other.
After more research I think it could be one of these issues:
-excessive carbon build up on valves.
-bad rocker arm
And repair options of:
- replace valve spring retainer locks with new ones (part 53022277AA) this is supposed to spin the valves quicker to prevent carbon build.
- new rocker arm because low compression can be a sticky valve
-replace or rebuild cylinder head
Has anyone had and experience with this issue? Any recommendations?
Thank You for your time!!