79 450sl... chugging, sputtering, and problems accelerating! - Page 3 - Mercedes-Benz Forum

LinkBack Thread Tools Display Modes
post #21 of 22 (permalink) Old 07-25-2009, 09:46 PM
BenzWorld Junior Member
Date registered: Jan 2007
Posts: 5
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
As for my 1973 450 se I was able to fix all problems I was having with it. It did have a bad computer but I nowwork for pick n pull and parts are available: it was keeping one injector open full time. As well the throttle position sensor had one of two bad switches in it. One switch simply measures throttle while the one that likes to break tells the computer when you're at idle, for a different mixture. I also found an incredible site all about the d jetronic system that gives tuning advice that litterally made this a race car. DJetronic Fundamentals
and another thing, this cars exhaust system factory is set up with straight pipes to a resonator about midway under the car then back to pipes and the normal muffler at the very back with no cross pipe up at the front, that's it. Now the factory claims the resonator drastically reduces noise which is why they install it. Well this car may have a brand new engine but it's still only american market, the owners manual claims the max speed of the car to be 121 mph. Well it only has about 3800 rpm while doing that but when I chopped out that resonator there was absolutely no noise difference, and with out doing any other tuning whatsoever the car became a beast and was then capable of an easy 140mph. Anyways since December I plowed it over a curb and bent the crossmember, but I decided I'm not letting this new engine go to waste so I had to build my dream car since I like the w123 a lot better(e class 77-85). So I got a82 240d with a bad engine and a manual transmission. But I was in the Richmond pick n pull about 2 months ago and I found what I never thought i'd find in a million years, it was a euro market special in the 350 se from about 76-79 a 4speed manual transmission, which everything bolts right up to the 4.5. As well all of the shift linkages and clutch slave are identical to the 240d manual so it will all bolt right up. And I have a 2.65:1posi differential for it that I got out of a 6.9 lietre. It is going to be just an absolutely redickulous car.
ajordan002 is offline  
Sponsored Links
post #22 of 22 (permalink) Old 03-01-2011, 02:41 PM
BenzWorld Newbie
Date registered: Mar 2011
Vehicle: 1974 450sl V8
Location: Florida
Posts: 4
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I have a 1974 450 sl. It was running great until my top radiator hose broke.
Points were burned so replaced points at 16 and rotor. Check coil and it is ok.
Cleaned spark plugs. Will run after setting points. Then sets for 30 min. or longer.
Starts rough and engines rocks hard back and forth. Mechanic can't figure it out.
Any help would be Thank full. Ray
glasspack 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