vacuum line issues - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 02-21-2005, 11:15 AM Thread Starter
BenzWorld Newbie
Date registered: Feb 2005
Posts: 4
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
vacuum line issues

Just acquired a 79 300 TD. Power locks never worked. Car dieseled for a minute before finally dying then evolved so it wouldn't stop at all when I removed the key. I plugged one of the vaccum lines and everything's back to normal. Then after a month, it's back to not shutting off at there a good place to start troubleshooting the vaccum system/a likely solution?? THANK YOU, Jared
fishcop04 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 02-22-2005, 04:41 AM
BenzWorld Senior Member
Date registered: Jan 2005
Posts: 499
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
RE: vacuum line issues

I have found in my TD that you start with the vacuum pump lines,all of them,change ALL the rubber connectors,the lines themselves will OK.Check the switch it'self,there are lines running to it and if the rubber connectors are perished there,they will either fall off or leak so you can't stop the engine.By changing any comnnectors you find,the auto trans will shift better and any little slippage will disapear.[:D]the doors will lock and UNlock properly,as long as the door actuators are all good.[:)]
mercmad is offline  
post #3 of 3 (permalink) Old 05-05-2005, 08:10 AM
BenzWorld Member
Captain Scott's Avatar
Date registered: Apr 2005
Vehicle: 1974 450 SL
Location: Coos Bay Oregon
Posts: 55
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
RE: vacuum line issues

Hi Ron/Jared,

I suspect I may have a slight vacuum leak somewhere that is effecting my idle and fuel mixture. Is there an easy way to check it without replacing all the rubber connectors in all the tight spots like under the dash, etc? All the tubing I can see in the engine comp looks like it is new or at least in good shape. I can probably come across a vacuum gauge... What should the values show?

Yes, its still me again.
Scott [8]
Captain Scott is offline  
Sponsored Links

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply

Register Now

In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Title goes here

video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome