4.2L running like a bag of crap

3 quarters full

"Mike Romain" > wrote in message
...
> Full tank?
>
> Mike
>
> Pi-Eyed Piper wrote:
>>
>> another symptom I just encountered, I honked on it coming out of a
>> parking
>> lot while grabbing lunch and smelled raw fuel really bad for a few
>> seconds..
>>
>> "Mike Romain" > wrote in message
>> ...
>> > 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

Ok, then I would be looking for a gas leak on the suction side of the
fuel pump. I usually see the leak where the rubber hoses attach to the
metal tubes along the frame rails either at the front or rear. I am
thinking front on yours.

Check the return line up front for leaks. Same place where the rubber
meets.

Mike

Pi-Eyed Piper wrote:
>
> 3 quarters full
>
> "Mike Romain" > wrote in message
> ...
> > Full tank?
> >
> > Mike
> >
> > Pi-Eyed Piper wrote:
> >>
> >> another symptom I just encountered, I honked on it coming out of a
> >> parking
> >> lot while grabbing lunch and smelled raw fuel really bad for a few
> >> seconds..
> >>
> >> "Mike Romain" > wrote in message
> >> ...
> >> > 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

ok. I'll do that. These seem to be 2 different things..or maybe not? I'll
check what you've suggested, thanks Mike

"Mike Romain" > wrote in message
...
> Ok, then I would be looking for a gas leak on the suction side of the
> fuel pump. I usually see the leak where the rubber hoses attach to the
> metal tubes along the frame rails either at the front or rear. I am
> thinking front on yours.
>
> Check the return line up front for leaks. Same place where the rubber
> meets.
>
> Mike
>
> Pi-Eyed Piper wrote:
>>
>> 3 quarters full
>>
>> "Mike Romain" > wrote in message
>> ...
>> > Full tank?
>> >
>> > Mike
>> >
>> > Pi-Eyed Piper wrote:
>> >>
>> >> another symptom I just encountered, I honked on it coming out of a
>> >> parking
>> >> lot while grabbing lunch and smelled raw fuel really bad for a few
>> >> seconds..
>> >>
>> >> "Mike Romain" > wrote in message
>> >> ...
>> >> > 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

Hi Jason,
Put another kit and fuel filter in it, sounds like it sucked up
some crap, and jammed your power jets, or just you needle valve.
God Bless America, ßill O|||||||O
http://www.billhughes.com/

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

Ok, will looks at that too, thanks Bill
"L.W. ("ßill") Hughes III" > wrote in message
...
> Hi Jason,
> Put another kit and fuel filter in it, sounds like it sucked up
> some crap, and jammed your power jets, or just you needle valve.
> God Bless America, ßill O|||||||O
> http://www.billhughes.com/
>
> 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