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Automatic Choke Operation

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Old 11-15-2008, 06:51 PM   #1
1st Gear Member
Join Date: Oct 2008
Vehicle: 1966 Ford Mustang
Location: Canada
Posts: 81
Default Automatic Choke Operation

I just want to make sure I understand how this feature works. All my vehicles have been newer and fuel injected so I am still learning about the old vehicles.

The vehicle is a 1966 Mustang with a 200ci.

From I understand, the choke will be activated until the exhaust manifold gets hot and then the choke tube that goes from the exhaust manifold to the carb will send hot air to the choke which will deactivate it.

Is this correct?

Now, the tube that goes from the exhaust manifold to the carb was rusted in half so the tube was not going to the exhaust manifold.

When I posted my thread about my spark plugs and the condition of my motor a few of the replies mentioned that it might be running on the rich side.

Is it possible that the choke was always on and this was causing my motor to run rich?

Again just trying to understand this system, I will definitely replace the tube when I reassemble.

Thanks Again
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st66ng is offline   Reply With Quote
Old 11-15-2008, 07:52 PM   #2
1st Gear Member
Join Date: Jul 2007
Posts: 63

yes, with the choke not getting enough heat it would be very slow to open, which would cause it to run rich for a longer amount of time.
Joe C
jc92073 is offline   Reply With Quote
Old 11-15-2008, 07:52 PM
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