No, is only does it on the idle circuit, once up to speed it runs
normal.

It is from chunks of crud usually found hiding in the steel gas line
between the filter and carb. No one remembers to clean this line. Then
if you run out of gas, it can suck black chunks from the charcoal
canister that cause the same trouble.

Mike

Pi-Eyed Piper wrote:
>
> when a vehicle runs lean does temp go up? Mine is still very normal
>
> "Mike Romain" > wrote in message
> ...
> > 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