Mud in my Veins
Join Date: Apr 2000
Location: Winston-Salem, NC
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Re: What is the part between Vac.Advance and Vac Sourc
Sounds like a themo-vacuum switch to me. It screws into the intake (seems like in front of the carb) and "adjusts"(?) the vacuum depending on the temp of the engine. Not very common on our vintage of Jeeps, but plentiful on later smog blocks.