Jeep: 89 YJ carb? problem

Hey Mick

I've had it for a couple of weeks and gone through a couple of tanks since
then, it did cool off a fair bit today, probably 1/3 of a tank right now,
maybe I'll fill it up tomorrow and see...

Brent


"Mick" <net> wrote in message
news:d61bqm$5vaf$infoave.net... 

If it was sitting before you bought it, you may have water in the gas due to
condensation. Try a couple cans of dry gas before spending too much time
and effort on other things. Mick
"HAKSAW_CA" <com> wrote in message
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Sounds more like a problem with the choke. It either needs adjustment or
replacement.

"HAKSAW_CA" <com> wrote in message
news:com... 

I'm not sure about that, the jeep runs pretty good when first started from
cold, the problem is once it is warmed up, and at that time the choke is
fully open.

Today filled up the tank (even added a fuel additive to help clean the fuel
system), ran it on the hwy for about 30 minutes + around town driveing for
another 30min. had to two foot it a every stop so it would not stall.

once home I adjusted the idle setting to step it up a bit more to help, and
playe with the fuel mixture screws. Ended up setting them both at 5 full
turns from fully in.

It now idles great in park, once in gear it drops a few hunderd RPM to
around 750, runs OK but still can feel it wants to stall when I come to a
stop. runs good as long as it's moving, its just the stopping that's a
problem.

I see a lot of sensors and even connections to the carb (I assume form the
computer), tried disconnecting them when I did nothing changed (at idle, I
didnt' try driving that way)

I'm getting good spark form all cylinders, i'm not sure what timing should
be but when hooked up to a timing light the timing mark was visible on the
marker plate (plate was very dirty so I don't now what the timing actually
was), does the computer decide on timing or can I manually adjust that?

thanks


"Dave" <hotmail.com> wrote in message
news:com... 

According to the repair manual it could be several things.
1. Idle speed incorrect.
2. Fuel filter clogged or water in fuel.
3. Choke not operating properly.
4. Damaged or wet distributor cap and wires.
5. Emissions system components faulty.
6. Faulty or incorrectly gapped spark plugs.
7. Vacuum leak at carburetor, intake manifold or vacuum hoses.

"HAKSAW_CA" <com> wrote in message
news:com... 

Thanks Dave,

1. I know it's not the idle speed setting (been playing with that one,
currently it's cranked up too high just to help it now stall)
2. I have yet to change the fule filter, but pretty sure there is plenty of
fuel getting though, at WOT and cruising there are no delay's or power loss
3. once warmed up the choke should be fully open witch it is so I dont think
its choke
4. though possible, I do seem to be getting good spark from each wire (with
a timing light check), I do have yet to pull all the plugs to check them
5. possible, but not sure how to test them, disconnecting etc. didnt make a
difference
6. still to check
7. this was my first assumptioin but spraying carb cleaner around hasn't
shown any vacume leaks yet, maybe i'm missing one somewhere though, I havn't
tryed around the intake manifold yet, next step will also probably to pull
all vacume hoses off the carb and cap them (one a a time, so test)...

Thanks for the tips, I do still question if the computer is causing it
because of a bad signal from one of the sensors, but I'm not reall sure what
role the computer plays? I do see wires going into the carb, so it must be
doing something to it, and of course the ignigion, i'm more concerned about
what the coputer may be telling the carb though, if it somehow plays with
the mixture, then maybe a bad signal from water temp or O2 sensor is telling
it to lean out too much or richen too much? (hopfully when I get the plugs
pulled I can tell by them)




"Dave" <hotmail.com> wrote in message
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