1972 220d - Page 2 - Mercedes-Benz Forum

Reply
 
LinkBack Thread Tools Display Modes
post #11 of 14 (permalink) Old 12-07-2010, 07:04 PM Thread Starter
BenzWorld Junior Member
 
b3lrod's Avatar
 
Date registered: Dec 2010
Posts: 8
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
(Thread Starter)
okay that makes a lot more sense now. thank you.
if that system keeps the engine from turning too fast, could i put the car in neutral and slowly depress the accelerator until the engine note stops rising? that seems like it would give me a good guess as to where i need to shift...
b3lrod is offline  
Sponsored Links
Advertisement
 
post #12 of 14 (permalink) Old 12-08-2010, 02:11 AM
BenzWorld Elite
 
Govert70227's Avatar
 
Date registered: Oct 2009
Vehicle: 2000 VW Golf Variant
Location: Leiden, Netherlands
Posts: 2,952
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
No, if you fully press the accelerator pedal with the transmission in neutral, the engine will rev to the highest speed unloaded, it wouldn't give you any indication on when to shift.

The tests I described are to determine whether the accelerator pedal fully opens the throttle and whether the throttle opens wide enough, because if not, the car will be slower than it should be.

I drive a similarly powered car (the 1980 200D, has the same horsepower but slightly lower torque) and in city driving I shift at around 2000-2500 rpm. That corresponds with the following shift points:

1 > 2 at 10 mph
2 > 3 at 20 mph
3 > 4 at 32 mph

When I'm accelerating to get onto the highway, I may shift at 50 mph from 3 > 4
Govert70227 is offline  
post #13 of 14 (permalink) Old 12-07-2011, 08:06 PM
BenzWorld Member
 
Date registered: Jun 2009
Vehicle: 1981 240D, 1981 280e, 1982 240D, 1982 280SL, 1990 300SEL
Location: Miami, Florida
Posts: 72
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I know this post died along time ago but I was wondering how you would be able to tell if the throttle was opening enough? I have a 1981 five speed 240D but the odometer has been disconnected for a very long time. I'm having problems getting my car up to speed sometimes. I've checked all the obvious like the linkages and the fuel filters so I'm not sure those would be the problem. I've checked a lot of other things that might be causing the car to accelerate slower than usual but I haven't run across anything obvious...
calogero05 is offline  
post #14 of 14 (permalink) Old 12-09-2011, 05:30 AM
BenzWorld Elite
 
Govert70227's Avatar
 
Date registered: Oct 2009
Vehicle: 2000 VW Golf Variant
Location: Leiden, Netherlands
Posts: 2,952
Mentioned: 0 Post(s)
Quoted: 4 Post(s)
Quote:
Originally Posted by calogero05 View Post
I know this post died along time ago but I was wondering how you would be able to tell if the throttle was opening enough? I have a 1981 five speed 240D but the odometer has been disconnected for a very long time. I'm having problems getting my car up to speed sometimes. I've checked all the obvious like the linkages and the fuel filters so I'm not sure those would be the problem. I've checked a lot of other things that might be causing the car to accelerate slower than usual but I haven't run across anything obvious...
The 1981 240D doesn't have a pneumatic governor, so there is no throttle. The 1982 240D does have a throttle for the EGR, but I don't think there is one on the 1981 model. If that is stuck, it can have an effect on performance. It is easily checked, there must be linkage from the valve cover to the intake manifold and the throttle is visible if you remove the air filter housing.

Have you checked the tank fuel filter? Checked all the fuel supply lines for possible air leaks?

The 1981 240D is a W123, that model has a specialised forum:
W123 E,CE,D,CD,TD,TE Class - Benzworld.org - Mercedes-Benz Discussion Forum
Govert70227 is offline  
Sponsored Links
Advertisement
 
Reply

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

Quick Reply
Message:
Options

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

Password:


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

Email Address:
OR

Log-in











  • 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



    Similar Threads
    Topic Author Forum Replies Last Post
    1972 220d Shifter Bushing GGCO Vintage Mercedes-Benz 2 08-14-2009 12:55 AM
    1972 220d smoker marvin9679 Vintage Mercedes-Benz 1 05-21-2009 07:04 AM
    Newby - 1972 220d - won't start marvin9679 General Mercedes-Benz 4 04-23-2009 04:30 PM
    parting out 1972 220d joelmopar For Sale/Wanted/Trade/Giveaway 1 04-14-2008 11:15 AM
    WTB M-B 220D parts (reasonable) - 1972 mjlehner For Sale/Wanted/Trade/Giveaway 1 01-13-2006 11:06 PM

    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

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