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Joined: Jul 2022
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Can I ask what this is and what plus into it? I believe it’s a vacumn but it’s right above the passenger side exhaust thanks


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Last edited by 83Monte305; 07/20/22 07:46 PM.
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1985 GMC Caballero 4.3L V6 TBI 200C w/ 2.41 posi
86 Monte Carlo SS BBC396 M20 w/ 3.42 posi screen name whip rust i.p.
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That is the EFE valve, works like a heat riser but vacuum controlled, it is routed thru a thermal vacuum switch, good luck!!


You could have posted all these questions in one post!!


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