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Old 07-21-2009, 09:46 PM
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1982 300D Turbo Vacuum Pressure?

Can someome please tell me what the vacuum reading should be on a 1982 300D Turbo - trying to diagnosis a slew of vacuum related problems and figured the first check would be to test the pump itself - (no door locks or center vent functioning - will shut off w/ the key if I cap off the door lock check valve

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Old 07-21-2009, 09:47 PM
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In excess of 20 in/Hg at the pump would be good.
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Old 07-21-2009, 09:52 PM
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Seems the pump itself isn't my problem then - where to start!
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Old 07-21-2009, 10:00 PM
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sounds like you have bad diaphrams in the vacuum locks. do you have a full reading at the check valve?
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Old 07-21-2009, 10:45 PM
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Vac leak in the door lock system, quite common. The center vents only work with fresh air.

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