Yes, but I cant tell what a lot of the stuff is. Best I can tell it is hosed
right. I recently changes all the vacuum lines but it had the same problem
before I did that. Next time I get a couple of days open I am going through
all the hoses again. Could anything be broke that would cause this.
Some GM cars have a temperature actuated vacuum switch to apply full vacuum
to the advance diaphragm when the engine is hot. Raises the idle to cool the
engine down. Can't say about this van. Chilton's has vacuum diagram books.
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