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What is this?


dhoneycutt

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attached is a picture of something in my engine compartment and I can't find any thing on it in the FSM or haynes or :stupid: All I know is that the one fitting was connected to the stock air cleaner assy but since I went with individual K&N's I don't have a place to connect it to. Does anyone know what it's purpose is?

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attached is a picture of something in my engine compartment and I can't find any thing on it in the FSM or haynes or :stupid: All I know is that the one fitting was connected to the stock air cleaner assy but since I went with individual K&N's I don't have a place to connect it to. Does anyone know what it's purpose is?

That item is called the "Flow Guide Valve". It is indeed a part of the emissions system (but on a 72 there is no charcoal canister). What it does is to route fumes from the gas tank to one of two different locations depending on whether the engine is running or not. If the engine is running, it will route the fumes to thebase of the air cleaner assembley so that they can be burned with the intake air that gets sucked into the engine. If the engine is not operating, the fumes are routed to the brather pipe on the side of the engine block which puts the fumes into the crankcase wear they remain until the engine is started, at which time they are drawn into the balance tube/intake manifold via the PCV valve and are then burned.

Ah, the joys of aftermarket crap that doesn't allow for emission equipment that doesn't take away HP from your engine, but does help the atmosphere that we breathe. Give my regards to K&N. :finger:

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That's the valve that allows the Fuel Tank to Vent to the Air Breather. Note the metal line tube going down and to the back of the engine compartment. You'll note that it goes into the tranny tunnel and back.

Don't just plug this up, as it may cause a fuel flow problem. Check with Bambikiller or 2ManyZ's or Beandip as to what / how to do this.

Enrique

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