bemfeito

1975 c3 automatic

I don't know what its called or what it does. If someone can point me on the right direction I would really appreciate.

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It is missing whatever it's supposed to connect to it. It is next to the coolant return hose.

oldalaskaman

its a temp switch for your smog system, if you dont live in a state where smog is required , most folks remove the hoses and run them direct. usually doesnt let the fresh air door on your air cleaner open till the engine reaches a pre determined temp.

bemfeito

Ok, thats good to know. I bought the car with full exhaust system including headers. I am just making sure everything is correct so I can get into fixing the high idle speed.

Does the hoses that were supposed to go to such switch need to be plugged? They have been removed so I would need to figure out where they go.

bemfeito

I found this picture on another thread. basically it is the vaccum line I need to plug when the smog system is disconnected. Is that the only place that needs to be plugged?

buckhorn 76

temp. sending unit for egr valve.

oldalaskaman

that doesnt need to be plugged, but the places that hook up to it are usually either plugged or have a hose directly connecting them. if you are running an aftermarket air cleaner plug every port you dont need

bemfeito

ok, I'll make sure all ports that arent being used are plugged. Thanks

oldalaskaman

sometimes that was also used to slow down the vacum advance untill the engine reached temperature, another smog use

bemfeito

interesting. Thank you everyone for helping me out, it has been a great experience and I am glad I bought this car.