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

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 10-04-2009, 08:56 PM
Registered User
 
Join Date: Aug 2005
Posts: 13
87 w201 2.5td no 3rd-4th shift

My trans only has 3k since rebuilt, won't shift 3rd-4th with vacuum connected, has new vcv 12hg at idle, down to 4 hg at high throttle, mod pressure checked and ok, modulator holds vacuum. I disconnected kickdown switch under pedal, no change. Trans will shift, third to fourth with vacuum disc to trans, but hard shifts, replaced trans filter and pan was clean. valve body spring? working pressure? Trans only has 3k, but that was over 3 yrs.
Reply With Quote
  #2  
Old 10-05-2009, 08:30 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Vacuum to modulator should drop to "0" inches of vacuum at full throttle.

If not then adjustments on the control valve at the injection pump OR at the modulator transducer are needed.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 10-05-2009, 11:23 AM
Registered User
 
Join Date: Aug 2005
Posts: 13
vacuum

how do you adjust vacuum transducer, is that same as vacuum amplifier, round blue plastic with 4 vacuum connections, that feeds modulator
Reply With Quote
  #4  
Old 10-06-2009, 07:56 PM
Registered User
 
Join Date: Aug 2005
Posts: 13
trans no 3rd to 4th shift

adj vacuum transducer and now have 12hg to around 0hg at vacuum line to trans modulator, still won't shift 3rd to 4th, yet will shift intermittant 3rd to 4th with modulator vacuum line off at transducer. Do I have broken modulator pin? or valve body spring(k2) problem? what im I overlooking.
Reply With Quote
Reply

Bookmarks

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 01:47 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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