mikehill256504
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- Jermichael
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- 1982
- Truck Model
- C10
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- straight 6
Help with the name of this part and what does it control.
- Thread starter mikehill256504
- Start date
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Memaloose
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Welcome from AZ.
My '81 Custom Deluxe with a 250 had the same actuator but that was long ago and don't remember. Looks like it opens and closes a valve on the exhaust. Can't tell from the photo. Exhaust definitely.
My '81 Custom Deluxe with a 250 had the same actuator but that was long ago and don't remember. Looks like it opens and closes a valve on the exhaust. Can't tell from the photo. Exhaust definitely.
RaisedK5
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- Blazer
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- 350
I believe that is the EFE valve. Basically a vacuum actuated exhaust valve that's part of the emissions system. See below.
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- Kalispell, Montana
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- Larry
- Truck Year
- 1981
- Truck Model
- C10
- Engine Size
- 250 6 cylinder
When it is pulled "on" by vacuum, it opens a flapper that allows exhaust gases to heat the intake manifold area right below the carburetor. With no vacuum, the spring inside pushes the flapper closed, like this:
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