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Old 02-02-2012, 05:47 PM
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Biodiesel300TD Biodiesel300TD is offline
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Join Date: Dec 2004
Location: Albany, OR
Posts: 4,845
First pull vac on the modulator. It won't hold vac but if you pull about 15"hg on it is should drop steadily down to zero in about 30 seconds. If you can't even get it up to 15 then the modulator is leaking and needs to be replaced.
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Andrew
'04 Jetta TDI Wagon
'82 300TD ~ Winnie ~ Sold
'77 300D ~ Sold
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