Thread: steps backwards - Is my vacuum understanding correct
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Old 07-28-2017, 03:57 PM
SD Blue SD Blue is offline
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Join Date: Jun 2004
Location: West of Ft. Worth. TX
Posts: 4,186
Some of that gunk you found may have made it inside the pump to the two small internal check valves. That is what happened on mine. If you are getting at least a reduced amount of vacuum, you may have similar.
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84 300SD 350K+ miles ( Blue Belle )
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