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Small tubes from intake plenum gasket - are they really needed?


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So I was watching a YouTube video on how to clean my throttle body.  It was very thorough except for one thing.  It never mentioned anything about the two small tubes that insert into the gasket that connects the plenum to the intake manifolds.  I've searched and can find no info on what these tubes are.  I snapped one and am not looking forward to trying to run a new one.  If I could just leave it off that would be best.

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The plastic tubes have to be replaced if damaged, they are vacuum tubes which, inter alia, controlled the resonance flap in the plenum and other vacuum operated parts. Leave it as it is not an option.

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