99% of the time it is the other way, running too lean which acts like
too rich.

Here is a good link to the test and likely fix for it. The tool used
can be obtained at any welding supply shop, it is used for cleaning
torch tips.

http://www.off-road.com/jeep/tech/engine/carter.html

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Pi-Eyed Piper wrote:
>
> I have a 4.2L with a brand new carb(nutters done) and header (feb) it has
> run SWEET up until a month ago, now it's running like crap...
>
> It's running really rich, that's the main symptom. Mileage isn't bad but
> it's not as good as it was. plugs have about 10K, wires are about a year
> old. it doesn't sputter or hesitate and still has great power. It seems to
> run closer to normal when it's at operating temp, which makes sense.
>
> Could this be as simple as adjusting the fuel/air mixture? Just seems weird
> that "bang" it's running really rich
>
> any help is appreciated
>
> Jason