1992 Isuzu Pu'p High Idling

My 2.3 ltr engine is idling high and it just recently started doing this. I
tried adjusting the throttle rest adjustment screw but it did nothing for
it. I should note that the carburetor has had a moderate miss to it for
some time now. I took the filter element and housing off and it still revs
high. I checked for proper connections of all vaccum lines. I have an
aftermarket air conditioner that was installed in 2000. The engine has
111,000 miles on it and does not smoke.

Can anyone offer some advice.

Thanks,

Ray

On Dec 5, 10:17 am, "Ray" > wrote:
> My 2.3 ltr engine is idling high and it just recently started doing this. I
> tried adjusting the throttle rest adjustment screw but it did nothing for
> it. I should note that the carburetor has had a moderate miss to it for
> some time now.

The carburetor has a miss to it????

> I took the filter element and housing off and it still revs
> high. I checked for proper connections of all vaccum lines. I have an
> aftermarket air conditioner that was installed in 2000. The engine has
> 111,000 miles on it and does not smoke.


Likely a vacuum leak or a gummed up carb. Also check the choke to see
if it is opening completely and check the high idle linkage.

>
> Can anyone offer some advice.
>
> Thanks,
>
> Ray

Thanks John, I'll look into your recomendations.

Ray


"John S." > wrote in message
...
> On Dec 5, 10:17 am, "Ray" > wrote:
>> My 2.3 ltr engine is idling high and it just recently started doing this.
>> I
>> tried adjusting the throttle rest adjustment screw but it did nothing for
>> it. I should note that the carburetor has had a moderate miss to it for
>> some time now.
>
> The carburetor has a miss to it????
>
>> I took the filter element and housing off and it still revs
>> high. I checked for proper connections of all vaccum lines. I have an
>> aftermarket air conditioner that was installed in 2000. The engine has
>> 111,000 miles on it and does not smoke.
>
>
> Likely a vacuum leak or a gummed up carb. Also check the choke to see
> if it is opening completely and check the high idle linkage.
>
>>
>> Can anyone offer some advice.
>>
>> Thanks,
>>
>> Ray
>