2004 Jeep Rubicon, 20k miles, automatic
I don't drive my Jeep much, and it has sat for almost 3 weeks waiting on a new driveshaft that finally showed up this week.
I drove it around Thursday night and out of nowhere it ran rough for about 30 seconds and the CEL blinked, then it cleared up and seemed to run fine. Got home and pulled a P0303 code (cylinder 3 misfire).
Drove it today and out of nowhere the same thing happened, except this time it was worse and at one point the Jeep stumbled badly. CEL blinked then stayed on solid. I got home and pulled P0301 and P0303. The engine also had a noticeable tick to it when I got in the garage that cleared up after I turned it off and restarted.
After searching the forum all I can conclude I'm either out a set of spark plugs, expensive cats, or will soon need a new engine (the "Death of a 4.0" lifter thread below this one has me scared to death!!!).
The Jeep has always ran well enough, although it has always seemed to idle somewhat rough in the year I've owned it. But I also am under the impression the old 4.0 is not as smooth as a new Cadillac either.
I'm off to buy some new NGK spark plugs. What else should I be doing?
Thanks
I don't drive my Jeep much, and it has sat for almost 3 weeks waiting on a new driveshaft that finally showed up this week.
I drove it around Thursday night and out of nowhere it ran rough for about 30 seconds and the CEL blinked, then it cleared up and seemed to run fine. Got home and pulled a P0303 code (cylinder 3 misfire).
Drove it today and out of nowhere the same thing happened, except this time it was worse and at one point the Jeep stumbled badly. CEL blinked then stayed on solid. I got home and pulled P0301 and P0303. The engine also had a noticeable tick to it when I got in the garage that cleared up after I turned it off and restarted.
After searching the forum all I can conclude I'm either out a set of spark plugs, expensive cats, or will soon need a new engine (the "Death of a 4.0" lifter thread below this one has me scared to death!!!).
The Jeep has always ran well enough, although it has always seemed to idle somewhat rough in the year I've owned it. But I also am under the impression the old 4.0 is not as smooth as a new Cadillac either.
I'm off to buy some new NGK spark plugs. What else should I be doing?
Thanks