Re: [Amc-list] Choke frozen (literally)

[Victor the Cleaner <jonathan@xxxxxxxxxx>]

On Wed, Jan 28, 2009 at 02:54:43PM -0500, Frank Swygert wrote:

> On that one there is a choke pull-off piston I think. 

Yes, that's right.

> A vacuum leak or loose fitting piston could keep it from disengaging. 
> It's not supposed to have a lot of vacuum on it, just enough to keep 
> a little tension on the choke plate, similar to having a light spring 
> on it. The theory is that a cold engine won't produce good vacuum.... 
> the piston may not fit tight enough until the carb body warms up either. 

The way I understand it, there are two functions here:  First, the piston
is what does the choke pulloff (qualification) of 3/16" when the motor is
first started cold.  Then the vacuum sucks in the warming air from the 
manifold - that's how the heat gets into the housing to heat up the bimetal
coil.  In tuneup all of that stuff functioned exactly as it should.

> Are you positive the bi-metal spring is pulling the right direction? 
> Check it again just to make sure! 

Yup, absolutely.

jl

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