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electrical component on plenum 2000 3.8
Last week I did the 171/174 overhaul. Went fine. On the back of the plenum (firewall side) there was an electrical component which was white, with a dial of some sort on the top of it, located on the passenger side of the plenum. What is this thing? I don't have a picture unfortunately. 2nd thing. What does the dial at the top control? I don't think I bumped/twisted it but would like to know what to watch out for etc.
TIA
Piper
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