Yellow-capped mystery component in engine compartment

atbigelow

New member
Jul 19, 2025
5
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Utah
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What in the flying heck is this thing? It's got a single vacuum line going into it, and two wires going into it. The PO ran one of them up into the cockpit and had it plugged into... nothing. 😂
 
I'm gonna guess an emissions solenoid, originally connected to a tangle of vacuum lines for distributor advance.