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This thing has been unplugged since i bougt the car. Recently plugged it and have been having issues here and there. Can someone tell me if i even need this plugged at all or where this plugs to? Its on the right sensor on the water neck on top. also below both vacuums there seems to be a connector. Do i need it? what does it do?
One side goes to the EFE valve, the other to hard vacuum, from a T off of one of the 3/8" (big) lines.
The thing that looks like a connector is a vent. (with a filter in it) The idea being, when the switch calls for vacuum no longer to be applied to the EFE valve, the vacuum that had been being fed to it, is allowed to escape through the filter. The filter is necessary because the state of California has determined that laboratory rats cannot live for more than a few seconds if the concentration of vacuum in their environment exceeds some arbitrary threshold, and therefore it must be filtered out. The filter probably has a defined maintenance schedule within that state to assure effective filtering performance is always guaranteed. Furthermore if accumulations of vacuum are found pooling on your engine, special cleaning procedures performed by highly trained technicians using a dedicated piece of high tech equipment known as a "vacuum cleaner" are required.
One side goes to the EFE valve, the other to hard vacuum, from a T off of one of the 3/8" (big) lines.
The thing that looks like a connector is a vent. (with a filter in it) The idea being, when the switch calls for vacuum no longer to be applied to the EFE valve, the vacuum that had been being fed to it, is allowed to escape through the filter. The filter is necessary because the state of California has determined that laboratory rats cannot live for more than a few seconds if the concentration of vacuum in their environment exceeds some arbitrary threshold, and therefore it must be filtered out. The filter probably has a defined maintenance schedule within that state to assure effective filtering performance is always guaranteed. Furthermore if accumulations of vacuum are found pooling on your engine, special cleaning procedures performed by highly trained technicians using a dedicated piece of high tech equipment known as a "vacuum cleaner" are required.
oh god dont even get me started with these California emission standards hahaha and where might my EFE valve be located?
the efe closes a butterfly valve between the right exhaust manifold and the y-pipe to divert exhaust gas through the crossover passages in the intake manifold to warm a cold mixture and improve cold start. you'll see a hard metal line coming from the valve for the vacuum attached to the tvs with a rubber line.
before reconnecting inspect your rubber line and the valve for proper function. the rubber lines have almost certainly deteriorated if original. you can also apply a vacuum source to the valve and verify it closes as the closing mechanism is observable.
you may find that in your location, if the winter's are not too harsh, that operating without the valve has no detrimental effects.
I got under the car today and the valve is wide open being held in place by a wire so its always open. Considering i live in Los Angeles i guess it really doesnt matter now does it? Should I keep the vacuum at the thermostat housing plugged or can i just leave it like that(without a plug)?
the efe closes a butterfly valve between the right exhaust manifold and the y-pipe to divert exhaust gas through the crossover passages in the intake manifold to warm a cold mixture and improve cold start. you'll see a hard metal line coming from the valve for the vacuum attached to the tvs with a rubber line.
before reconnecting inspect your rubber line and the valve for proper function. the rubber lines have almost certainly deteriorated if original. you can also apply a vacuum source to the valve and verify it closes as the closing mechanism is observable.
you may find that in your location, if the winter's are not too harsh, that operating without the valve has no detrimental effects.
How is the steel pipe connect to the valve? It seems to slide in, but what seals it and keeps it in place?
and where might my EFE valve be located? 
