rough idle at cold start choke problem?
 

My 88 YJ has been starting rough lately, the choke doesn't seem to be
kicking in (low RPM's on a cold start) keeping the RMP's around 1500
with the gas for about a minute or so gets it past the roughness.
Otherwise it idles and starts perfectly. No stalling and idles right
around 500 to 700 RMP's. How can I tell if the choke it working correctly?

Re: rough idle at cold start choke problem?
 

"Simon Juncal" <sjuncal@erols.com> wrote in message
news:3FD55761.7060409@erols.com...
> My 88 YJ has been starting rough lately, the choke doesn't seem to be
> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
> with the gas for about a minute or so gets it past the roughness.
> Otherwise it idles and starts perfectly. No stalling and idles right
> around 500 to 700 RMP's. How can I tell if the choke it working correctly?
>

When the engine is cold, remove the air cleaner and open the throttle about
half way. the choke plate should shut on the top of the carb. It wont close
all the way, but should have about 1/8" gap left. When the choke closes, it
will also actuate a fast idle cam on the carb. This will hold the throttle
open a bit more than normal. Once you start the engine the choke should open
a bit more. By the sounds of your description, it sounds like your choke
plate isn't closing enough or at all. If this is the case it is probably a
bad choke spring, or possibly the wire feeding it voltage is broken or
unhooked.

Chris

Re: rough idle at cold start choke problem?
 

"Simon Juncal" <sjuncal@erols.com> wrote in message
news:3FD55761.7060409@erols.com...
> My 88 YJ has been starting rough lately, the choke doesn't seem to be
> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
> with the gas for about a minute or so gets it past the roughness.
> Otherwise it idles and starts perfectly. No stalling and idles right
> around 500 to 700 RMP's. How can I tell if the choke it working correctly?
>

When the engine is cold, remove the air cleaner and open the throttle about
half way. the choke plate should shut on the top of the carb. It wont close
all the way, but should have about 1/8" gap left. When the choke closes, it
will also actuate a fast idle cam on the carb. This will hold the throttle
open a bit more than normal. Once you start the engine the choke should open
a bit more. By the sounds of your description, it sounds like your choke
plate isn't closing enough or at all. If this is the case it is probably a
bad choke spring, or possibly the wire feeding it voltage is broken or
unhooked.

Chris

Re: rough idle at cold start choke problem?
 

"Simon Juncal" <sjuncal@erols.com> wrote in message
news:3FD55761.7060409@erols.com...
> My 88 YJ has been starting rough lately, the choke doesn't seem to be
> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
> with the gas for about a minute or so gets it past the roughness.
> Otherwise it idles and starts perfectly. No stalling and idles right
> around 500 to 700 RMP's. How can I tell if the choke it working correctly?
>

When the engine is cold, remove the air cleaner and open the throttle about
half way. the choke plate should shut on the top of the carb. It wont close
all the way, but should have about 1/8" gap left. When the choke closes, it
will also actuate a fast idle cam on the carb. This will hold the throttle
open a bit more than normal. Once you start the engine the choke should open
a bit more. By the sounds of your description, it sounds like your choke
plate isn't closing enough or at all. If this is the case it is probably a
bad choke spring, or possibly the wire feeding it voltage is broken or
unhooked.

Chris

Re: rough idle at cold start choke problem?
 

In message <SAdBb.113985$Eq1.18194@twister.rdc-kc.rr.com>, "c" wrote:

>"Simon Juncal" <sjuncal@erols.com> wrote in message
>news:3FD55761.7060409@erols.com...
>> My 88 YJ has been starting rough lately, the choke doesn't seem to be
>> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
>> with the gas for about a minute or so gets it past the roughness.
>> Otherwise it idles and starts perfectly. No stalling and idles right
>> around 500 to 700 RMP's. How can I tell if the choke it working correctly?
>>
>
>When the engine is cold, remove the air cleaner and open the throttle about
>half way. the choke plate should shut on the top of the carb. It wont close
>all the way, but should have about 1/8" gap left. When the choke closes, it
>will also actuate a fast idle cam on the carb. This will hold the throttle
>open a bit more than normal. Once you start the engine the choke should open
>a bit more. By the sounds of your description, it sounds like your choke
>plate isn't closing enough or at all. If this is the case it is probably a
>bad choke spring, or possibly the wire feeding it voltage is broken or
>unhooked.
>
>Chris
>

The choke should close all the way when cold, and the engine not running. If it
doesn't, something's wrong.

Also, the wire going to the choke operates the heater to open the choke, not
close it.

Re: rough idle at cold start choke problem?
 

In message <SAdBb.113985$Eq1.18194@twister.rdc-kc.rr.com>, "c" wrote:

>"Simon Juncal" <sjuncal@erols.com> wrote in message
>news:3FD55761.7060409@erols.com...
>> My 88 YJ has been starting rough lately, the choke doesn't seem to be
>> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
>> with the gas for about a minute or so gets it past the roughness.
>> Otherwise it idles and starts perfectly. No stalling and idles right
>> around 500 to 700 RMP's. How can I tell if the choke it working correctly?
>>
>
>When the engine is cold, remove the air cleaner and open the throttle about
>half way. the choke plate should shut on the top of the carb. It wont close
>all the way, but should have about 1/8" gap left. When the choke closes, it
>will also actuate a fast idle cam on the carb. This will hold the throttle
>open a bit more than normal. Once you start the engine the choke should open
>a bit more. By the sounds of your description, it sounds like your choke
>plate isn't closing enough or at all. If this is the case it is probably a
>bad choke spring, or possibly the wire feeding it voltage is broken or
>unhooked.
>
>Chris
>

The choke should close all the way when cold, and the engine not running. If it
doesn't, something's wrong.

Also, the wire going to the choke operates the heater to open the choke, not
close it.

Re: rough idle at cold start choke problem?
 

In message <SAdBb.113985$Eq1.18194@twister.rdc-kc.rr.com>, "c" wrote:

>"Simon Juncal" <sjuncal@erols.com> wrote in message
>news:3FD55761.7060409@erols.com...
>> My 88 YJ has been starting rough lately, the choke doesn't seem to be
>> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
>> with the gas for about a minute or so gets it past the roughness.
>> Otherwise it idles and starts perfectly. No stalling and idles right
>> around 500 to 700 RMP's. How can I tell if the choke it working correctly?
>>
>
>When the engine is cold, remove the air cleaner and open the throttle about
>half way. the choke plate should shut on the top of the carb. It wont close
>all the way, but should have about 1/8" gap left. When the choke closes, it
>will also actuate a fast idle cam on the carb. This will hold the throttle
>open a bit more than normal. Once you start the engine the choke should open
>a bit more. By the sounds of your description, it sounds like your choke
>plate isn't closing enough or at all. If this is the case it is probably a
>bad choke spring, or possibly the wire feeding it voltage is broken or
>unhooked.
>
>Chris
>

The choke should close all the way when cold, and the engine not running. If it
doesn't, something's wrong.

Also, the wire going to the choke operates the heater to open the choke, not
close it.

Re: rough idle at cold start choke problem?
 

"bllsht" <nospam@invaliddot.net> wrote in message
news:b4vatvojkfban0h025i4icfcfsug93gtss@4ax.com...
> In message <SAdBb.113985$Eq1.18194@twister.rdc-kc.rr.com>, "c" wrote:
>
> >"Simon Juncal" <sjuncal@erols.com> wrote in message
> >news:3FD55761.7060409@erols.com...
> >> My 88 YJ has been starting rough lately, the choke doesn't seem to be
> >> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
> >> with the gas for about a minute or so gets it past the roughness.
> >> Otherwise it idles and starts perfectly. No stalling and idles right
> >> around 500 to 700 RMP's. How can I tell if the choke it working
correctly?
> >>
> >
> >When the engine is cold, remove the air cleaner and open the throttle
about
> >half way. the choke plate should shut on the top of the carb. It wont
close
> >all the way, but should have about 1/8" gap left. When the choke closes,
it
> >will also actuate a fast idle cam on the carb. This will hold the
throttle
> >open a bit more than normal. Once you start the engine the choke should
open
> >a bit more. By the sounds of your description, it sounds like your choke
> >plate isn't closing enough or at all. If this is the case it is probably
a
> >bad choke spring, or possibly the wire feeding it voltage is broken or
> >unhooked.
> >
> >Chris
> >
>
> The choke should close all the way when cold, and the engine not running.
If it
> doesn't, something's wrong.

I was shooting from the hip here since I don't have a Jeep, but many carbs
have a small gap left where the choke doesn't close completely. Maybe his
doesn't.

>
> Also, the wire going to the choke operates the heater to open the choke,
not
> close it.


Yup, my bad. Not sure what I was thinking, it's late. ;-)

Chris

Re: rough idle at cold start choke problem?
 

"bllsht" <nospam@invaliddot.net> wrote in message
news:b4vatvojkfban0h025i4icfcfsug93gtss@4ax.com...
> In message <SAdBb.113985$Eq1.18194@twister.rdc-kc.rr.com>, "c" wrote:
>
> >"Simon Juncal" <sjuncal@erols.com> wrote in message
> >news:3FD55761.7060409@erols.com...
> >> My 88 YJ has been starting rough lately, the choke doesn't seem to be
> >> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
> >> with the gas for about a minute or so gets it past the roughness.
> >> Otherwise it idles and starts perfectly. No stalling and idles right
> >> around 500 to 700 RMP's. How can I tell if the choke it working
correctly?
> >>
> >
> >When the engine is cold, remove the air cleaner and open the throttle
about
> >half way. the choke plate should shut on the top of the carb. It wont
close
> >all the way, but should have about 1/8" gap left. When the choke closes,
it
> >will also actuate a fast idle cam on the carb. This will hold the
throttle
> >open a bit more than normal. Once you start the engine the choke should
open
> >a bit more. By the sounds of your description, it sounds like your choke
> >plate isn't closing enough or at all. If this is the case it is probably
a
> >bad choke spring, or possibly the wire feeding it voltage is broken or
> >unhooked.
> >
> >Chris
> >
>
> The choke should close all the way when cold, and the engine not running.
If it
> doesn't, something's wrong.

I was shooting from the hip here since I don't have a Jeep, but many carbs
have a small gap left where the choke doesn't close completely. Maybe his
doesn't.

>
> Also, the wire going to the choke operates the heater to open the choke,
not
> close it.


Yup, my bad. Not sure what I was thinking, it's late. ;-)

Chris

Re: rough idle at cold start choke problem?
 

"bllsht" <nospam@invaliddot.net> wrote in message
news:b4vatvojkfban0h025i4icfcfsug93gtss@4ax.com...
> In message <SAdBb.113985$Eq1.18194@twister.rdc-kc.rr.com>, "c" wrote:
>
> >"Simon Juncal" <sjuncal@erols.com> wrote in message
> >news:3FD55761.7060409@erols.com...
> >> My 88 YJ has been starting rough lately, the choke doesn't seem to be
> >> kicking in (low RPM's on a cold start) keeping the RMP's around 1500
> >> with the gas for about a minute or so gets it past the roughness.
> >> Otherwise it idles and starts perfectly. No stalling and idles right
> >> around 500 to 700 RMP's. How can I tell if the choke it working
correctly?
> >>
> >
> >When the engine is cold, remove the air cleaner and open the throttle
about
> >half way. the choke plate should shut on the top of the carb. It wont
close
> >all the way, but should have about 1/8" gap left. When the choke closes,
it
> >will also actuate a fast idle cam on the carb. This will hold the
throttle
> >open a bit more than normal. Once you start the engine the choke should
open
> >a bit more. By the sounds of your description, it sounds like your choke
> >plate isn't closing enough or at all. If this is the case it is probably
a
> >bad choke spring, or possibly the wire feeding it voltage is broken or
> >unhooked.
> >
> >Chris
> >
>
> The choke should close all the way when cold, and the engine not running.
If it
> doesn't, something's wrong.

I was shooting from the hip here since I don't have a Jeep, but many carbs
have a small gap left where the choke doesn't close completely. Maybe his
doesn't.

>
> Also, the wire going to the choke operates the heater to open the choke,
not
> close it.


Yup, my bad. Not sure what I was thinking, it's late. ;-)

Chris