Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

LinkBack Thread Tools Display Modes
Old 01-06-2004, 10:42 PM
Registered User
Join Date: Jan 2001
Location: oregon
Posts: 2,013
test vacuum control ?

Can anyone tell me how to test the vacuum control unit that sits on top the IP and controls vacuum to the tranny modulator on my 81 SD.I have a mighty vac........ thanks

William Rogers.........
Reply With Quote
Old 01-06-2004, 11:59 PM
BoostnBenz's Avatar
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....
Jeff M.
Mercedes W123 DIY pages are now located here.
1983 / 1984 300D Sold
2000 CLK430 Cabriolet ~58k Sold
2005 Avalanche 4x4 ~66k
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 02:19 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page