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Old 01-06-2004, 11:59 PM
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BoostnBenz BoostnBenz is offline
Benötigt Mehr Druck!
 
Join Date: Aug 2002
Posts: 1,855
Remove the black line to the tranny and setup the MityVac there. Take a reading at idle, a short WOT burst, and with the arm 10mm from the stop. It should be 15-17", 0-2", 5-6.5"hg respectively. Another test I like to do is remove the line off of the valve and see if it holds vacuum to 15"hg, most of them which aren't that great in the above range also leak like this....
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Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
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