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On 20 Aug 2003 at 17:08, Shad Laws wrote: > > Neither of these should have any effect at idle, so I find myself > wondering if > > your butterfly valve isn't closing all the way, right away. > > I also wonder if the retard diaphragm is cracked and leaking. This is the > #1 most common failure for dual-vacuum canisters, and since the retard > portion gets its pickup from below the throttle plate, would cause a problem > with idle. That's certainly what it sounds like, but didn't he say that he had a '70? And the dist numbers he quoted were 70 and 73, as were his 265 and 505 vacuum cans. Neither of these has the vacuum retard; that's the 883 vacuum can used only in 72. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org