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#1
08-30-2010, 01:41 PM
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should modulator valve hold vacuum
I just purchased A new modulator valve (red one ) for my 81 240D because my old one was leaking. Before installing it I assymbled it (cap o-ring ect.) and hooked up A hand held vacume pump and got 15-20 hg vacume and it leaked down right away. My question is should it hold vacume if tested this way even with my finger over end that normaly screws into the transmission?
 THANKS !!! in advance
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#2
08-30-2010, 02:29 PM
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For a while, but not terribly long.
__________________
83 SD 84 CD
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#3
08-30-2010, 03:04 PM
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Your finger may not be a very good seal. Put some tranny fluid on it and make sure your connection to the modulator is giving you a good seal as well.
Richard
__________________
85 300D 75K Anthracite Grey 0-60 in 13 seconds **For Sale** 84 300D 333K Black (The Velveteen Rabbit) 0-60 in 14 seconds 00 Toyota Sienna 208K (Sold) 15 Subaru Outback 43K 11 Subaru Outback 67K 98 Ford Taurus 100K (Gertie - Was Grandma's - drove it to church and shopping - really) Daughter's car now. 30 Model A Ford 2 Door Sedan (Sold) 0-60 in . . . Never reached 60 
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#4
08-30-2010, 03:10 PM
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You should be able to pull vac on it and it should bleed off in about 30 seconds.
__________________
Andrew '04 Jetta TDI Wagon  '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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