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#1
10-02-2008, 02:55 PM
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"Stuff" under the air-filter
Searching for a source of a vacuum leak I have come across the 2 controllers under the air-filter box (part#001 540 79 97). Even though they are located side/by/side, they react in a different way when tested with my MityVac. The bottom nipple and the one directly above it hold vacuum in one of them and in the other the bottom one does but not the one directly above it. In addition, there are two other nipples on the top "dish" that act the same on both. Does anyone know how to test them? Also, the newer version has only one nipple on the bottom and 2 on the top so it is not the same thing(must be some inline change that happened over last 20 years...). Appreciate any insights.
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#2
10-02-2008, 03:15 PM
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Model and year would be helpful for us to help you. I assume its the 87 300TD in your profile.
__________________
Andrew '04 Jetta TDI Wagon  '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#4
10-02-2008, 04:43 PM
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Many people disable both of these, they are EGR and ARV, the 5-way connector in front of the cam cover can be replaced with a 3-way F connector.
Either that, or pull the two lines off leading to those, put a BB in each rubber fitting, and replace the line (blocking vacuum / airflow).
__________________
 Gone to the dark side - Jeff
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