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88 740 wagon 330k : What is the little hose fitting for? 700

posted by  mrwood on  Wed Feb 11 17:51 CST 2009
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last visit: Sun Aug 19 00:17 CST 2012
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I mean the one on the throttle body (?) that is near the rubber elbow connected to the air cleaner. It is brass, with a small tube projecting up for a rubber hose. There is a long,hard thin black tube nearby, flopping around, that seems to go to a tank by the drivers side headlight. Cruise control stuff?

I'm concerned about a vacuum leak and plugged the brass fitting. Seeking enlightenment...






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