What is this?

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wamullins

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Anthony
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1982
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C-10
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305
82 c-10 stock 305
On the passenger side exhaust manifold, there is a vacuum line that goes to what looks like a valve?
 
1987 GMC Jimmy

1987 GMC Jimmy

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wamullins said:
82 c-10 stock 305
On the passenger side exhaust manifold, there is a vacuum line that goes to what looks like a valve?
Click to expand...

Sounds like the EFE (Early Fuel Evaporation) Valve. This is mine behind the oil dipstick.
 

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