Carburetor idle jet solenoid help

Thomas76

Thomas76

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I received a pair of 32/36 dgav webers with this solenoid jet threaded into the primary idle jet location. My 1970 does not have wiring for this thing.
Assuming this solenoid came along during the later years, Does anyone know how our cars electric system incorporated this? Not exactly sure this concept was used on zenith's?
Any history would be much appreciated. Thanks!
IMG_20210207_110740413.jpg
 
I think all Zenith’s had this and the wiring is green and/or green/white (can’t remember), other items powered by a relay on the booster mount, temp sensor under front manifold and wiring to the chokes.
 
Purpose is to shut off fuel in the idle circuit to prevent dieseling or run-on after the ignition switch is turned off. I forget now whether the solenoid is closed or open when not powered, but you can test it with a 12VDC hot and ground, it should audibly click. Use the search function, these have been discussed before though perhaps not recently.
 
Ah ha! That makes perfect sense. They do have a tendency to diesel. My wires are long gone if they were ever there (1970). I'll look for them on schematics but I assume they're powered through the ignition switch, and finds something else under the hood to borrow power from. Thanks everyone!
 
Oh, I should probably follow the advise and power them up to prove they work before I install em.
 
No solenoid installed on a DGAV would function to shut off the idle circuit while driving. The idle circuit on a DGAV is constantly in use for ordinary street driving.
 
HB Chris said:
It is designed to stop fuel when ignition is off.
Click to expand...

Aha. I misunderstood one of the earlier posts.

So, do these install in place of the idle jet holder, so that the pin or ram extends and prevents fuel flow through the idle jet when the solenoid is activated?
 
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