Intermittent misfire and rough idle (2005 Wrangler X 4.0 automatic)

[Luke90]

quick follow up after my comeback in Italy for the weekend.
I put back to stock the Jeep, except for Autolite spark plugs. Then i changed the injectors with new OEM ones, and no misfire at all and jeep runs smoothly.
no CEL lights, even after a weekend of city/ highway/ hard offroad.
I am very happy...and I think also lucky.
I always run RON100 Fuel, so curious to see how will it ride with 'only' the standard 95 one.

 

[Luke90]

after sun there is always rain...and misfire is back, sadly. will re-read all this thread!

 

[macleanflood]

Well at least you know it's moisture related and that's an important clue.

-Mac

 

[Luke90]

I did not refuel it, so it has inside still the RON100. I have feeling it has something related to valves, I'll need to check these first.