Bad choke gasket?
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Joined: Jun 2007
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Bad choke gasket?
I hooked up a "smoke machine" (home made with a jar, two rubber hoses and a smoking object in the jar. One hose connected to the center tube on the front of the carb and I blew gently thru the other end) and found smoke coming out of the round gasket of the choke adjustment. I learned that at some point, I did not put the tension clips back on when I had reinstalled it. As a result, the choke turns freely when the bolts are tightened. But, before I realized the clips were missing, I did the smoke test.
Would this "leak" be a source of a vacuum leak when the engine is under a load?
Just to confirm, there is a small hole/opening at the bottom front corner of the choke area. while smoke also came out of there, that is not the area that I am concerned about. I am referring to the gasket where the black round choke adjustment mounts to.
Would this "leak" be a source of a vacuum leak when the engine is under a load?
Just to confirm, there is a small hole/opening at the bottom front corner of the choke area. while smoke also came out of there, that is not the area that I am concerned about. I am referring to the gasket where the black round choke adjustment mounts to.
Elder User
Joined: Nov 2003
Posts: 778
Likes: 2
From: southeast Idaho
Yes it would be a vacuum leak, clean air is drawn thru the choke to cool the spring inside on many electric or electric assisted carbs and its drawn thru by vacuum from the engine. Probably wouldn't notice much under load, unless it whistled or something like that,but would affect it more at idle plus sucking unfiltered air into your engine.. I can't think of what opening you might be speaking of though..
MSEE
Joined: Apr 2004
Posts: 10,386
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From: Austin, TX
To the OP - I couldn't really follow what you're saying.
Refer to this thread on how the hot-air choke is supposed to work:
https://www.ford-trucks.com/forums/8...-answered.html
Elder User
Joined: Nov 2003
Posts: 778
Likes: 2
From: southeast Idaho
Demon carbs with electric choke have no air moving thru them at all, not to cool the spring or to heat it, which seems kind of odd but that is how they are built. Holley and Edelbrock both pull air thru them to cool the spring which is what I was talking about earlier. I know the stock ones with heat stove are the opposite but they don't use a full 12 volts thru the choke either.
I read your article on chokes quite a while ago, and liked it. I thought it was good information and well explained also. It just didn't occur to me that he may have been talking about a stock choke set up with the heat tube and all. That happens to me sometimes though, I try to read everything twice before saying anything but even that doesn't help sometimes..
I read your article on chokes quite a while ago, and liked it. I thought it was good information and well explained also. It just didn't occur to me that he may have been talking about a stock choke set up with the heat tube and all. That happens to me sometimes though, I try to read everything twice before saying anything but even that doesn't help sometimes..
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