Installed my rebuilt carb

[Carls_jeep]

I installed my rebuilt carb about a week ago and put the new throttle cable in. I made a stop with a thumb screw to hold the throttle open where I set it. Sometimes it would stay and sometimes it would slip closed so it needed a manual stop.

The engine is a little more cold natured with the rebuilt carb. I pull the throttle out about 3/4" and about 3/4" of choke and it does ok and after a few minutes I can open the choke and release the throttle. The accelerator pump is set right because it doesn't stumble when you step on the pedal at any speed. The power needle seems to be set right also as there are no problems others have described with power needle adjustments.

My Jeep has always been a little cold natured and the change was not very much so all in all it's turned out to be a good fix.

I was hoping that the rebuilt carb would take out some if not all of the sputtering the engine does at idle. The distributor shaft has very little if any play so I don't think it's the distributor but it acts like an intermittent miss rather than a fuel issue. As soon as I put a slight load on the engine by going down to idling on the road in high gear and then open the throttle slightly the engine smooths out. It just has the intermittent sputter/miss at idle.

Do any of you have that sputter/miss at idle? How did you get rid of it?

[RussellL]

Could be a vacuum leak. �You test that by spraying something like carb cleaner at various places where vacuum might leak, and listen for a change in the idle. �Spray around the carb base, intake gasket and any other connections to the intake including vacuum lines to the wipers and such. �You have to do it carefully so the spray is not just being sucked into the carb throat. �If you hear a change, it is probably leaking there.

[Carls_jeep]

Yeah, I haven't tried for a vacuum leak yet because it acts more like a spark miss but I plan to do that. A vacuum leak usually causes a rough idle more than spitting or missing.

[Carls_jeep]

Well, there isn't a vacuum leak but it sure don't like the way I adjusted the idle bleed screw. I put a vacuum gauge on it and it told me I may have to do a valve job but it has good vacuum, 18-20 inches. I then started adjusting the idle bleed screw and the idle screw and got the engine idled down and the sputtering almost gone. I had the idle bleed screw in to far. Normally you screw it in until the engine slows a little and back it out 1/4 to 1/2 turn but it likes more like a full turn or more.

I am thinking the leaking valve may be causing that. Some day I may give it a valve job. Perhaps when I do the head gasket.

Well, it still runs nice for me so why get in a hurry, right.  

I think this carb rebuild has solved some problems so it's a good move. It was fun doing it anyway.