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Old 06-01-2007, 10:33 PM
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Blevinsax Blevinsax is offline
'91 350SD GreaseCar
 
Join Date: Jun 2006
Location: Las Vegas, NV
Posts: 480
Quote:
Originally Posted by Brian Carlton View Post
That's not a symptom of a failed shutoff diaphragm.........it's a sign of a large vacuum leak thereby depriving both the ignition switch and the climate control systems the necessary vacuum to function.
What about the check valve on the vaccuum pump? BioD300TD mentioned perhaps it is the shut-off valve or the check valve on the vaccuum pump. Might that be a possibility?

Otherwise, where should I start looking for the large vaccuum leak, and how?
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Autos:
1991 350SD 276,000 miles
2001 VW Beetle TDI 115,000 miles

Horns:
1955 Selmer Mark VI Alto (55,xxx)
1958 Selmer Mark VI Tenor (85,xxx)
1964 Selmer Mark VI Tenor (125,xxx)
1967 King Super-20 Tenor (430,xxx)
2002 Selmer Series III Soprano

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