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I was just doing a tstat change and came across this very small diameter tube. I'm not sure where it goes, can you guys help me out? I'll be looking around on real OEM, but any advice in the mean time would be great, thanks! It's wrapped in black tape, and disappears under the plenum--i know the picture is grainy, but i circled the end in the attached picture.
 

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It’s the vacuum line that goes to the SAP Valve that sits in front of the right timing case.
 
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