Missing Emissions Jet

[Bdeal223]

So I was looking at the vacuum line diagram last night and noticed this "Jet" that is on the back choke breaker vac line. Well I realized that I do not have one on this car. What is the purpose of this jet and if it is not utilized will it affect how the car runs?

Thanks in advance!

CB Jet.jpg

[irowiki]

A good deal of carbs have that jet built into the port on the carb, so you're fine.

[Bdeal223]

Great, thanks for the info!

[Mark]

I think it's just a small orfice or restriction in the vacuum line to delay the vacuum being applied to the choke breaker diaphragm by about a second. This allows a very rich mixture during the first second or so during cold starts. The choke breaker then opens the choke slightly (again, after about a second) to allow more air through. If the choke breaker doesn't open, the engine will quickly stop since the fuel-air mix would be too rich to continue running. If your car starts fine, the choke breaker is working fine and there's no reason to worry about a possible missing "jet" (I don't know why they call it that).

[irowiki]

Some carbs don't have the restricted port and need the jet