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Old 08-10-2018, 03:47 PM   #6
Steeveedee
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Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,202
Re: Help identifying these parts on Mono-Jet

You have a thermostatic coil spring choke. If you look at the choke plate and the bell crank connected to it, you can follow the rod down onto the top of the exhaust manifold. I can't see it for the rest of the stuff in the way, but that is where it is supposed to be. It isn't a manual choke carburetor, because there is a choke pull off assembly on it. That's the vacuum can opposite the bell crank.

Look at your connectors. Does the one with two wires plug into the idle stop solenoid? I thought those had one wire and were chassis grounded, but I'm a little hazy on that memory.

The TCS system was used to limit vacuum advance until the vehicle was warmed up and in high gear. This served to cause faster warm up and to limit hydrocarbon emissions. It is pretty much only a California emissions system, and can be bypassed if you want. Simply take the vacuum to the thermostatic switch (if still so equipped) and connect it directly to the vacuum advance chamber. You can also remove all the wires, if you want, as they won't serve any more purpose once the vacuum side is dealt with. You might want to keep the parts in case someone wants to put their system back to stock.
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'70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper

Simi Valley, CA

Last edited by Steeveedee; 08-10-2018 at 08:56 PM. Reason: typo
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