Very sluggish 240

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Very sluggish 240 - 8/15/2007 8:53:09 AM    2tone240   Posts: 5 Joined: 7/26/2007 Status: offline I have found that at least one of the reasons that my car is so bloody slow is b/c the butterfly in the carb is only opening about 1/3 of the way. So of course i tired to make some adjusments so that it opens all the way. no it opens about 3/4's (the butterfly) ,but all the corresponding linkages are bottomed out. ?'s - are there any reference points that i can use to properly adjust ALL of the linkages - are there any manuals that contain related info (hanyes has a cool cover but that's about it) thanks-zach Post #: 1

RE: Very sluggish 240 - 8/29/2007 10:34:00 AM    rkirkhus   Posts: 5 Joined: 7/24/2007 Status: offline I just bought a 1983 240D and upon adjusting the valves found the linkage to this butterfly valve seized (in the open position).  In trying to free the linkage I broke the vertical shaft that goes down to the ball joint on the intake manifold.  I freed all the linkage up, welded the rod back together, and thought I had just done a "good thing" and had fun doing it.  I was curious about the butterfly valve (thinking it may have been some kind of cold start aid).  I went looking around on the net and low and behold, guess what one of the pieces of advice was...?  The butterfly valve is emissions related and it was recommended the linkage be removed and the valve wired open!!!    I still had fun making it work properly and didn't spend any money on it.  Hope this helps. (in reply to 2tone240) Post #: 2

RE: Very sluggish 240 - 8/29/2007 6:20:41 PM    ForcedInduction Posts: 731 Joined: 5/20/2006 From: Federal Heights, Colorado Status: offline Yes, the butterfly valve is just to force more exhaust to flow through the EGR and into the intake. Block the vacuum line to the EGR and wire the butterfly open. _____________________________ 1980 240D 3.0VNTi 216K Miles. OM617.95, GT2256V VNT turbo, 4-speed manual, Intercooler, 3.46 diff, 15mm rear swaybar, ALDA removed, no EGR and Amsoil by-pass oil filter. Currently 107HP and 195lb/ft of torque at the wheels. www.youtube.com/Turbo617 (in reply to rkirkhus) Post #: 3

RE: Very sluggish 240 - 5/30/2008 6:01:34 PM    Scuddog Posts: 89 Joined: 6/4/2007 Status: offline Forced Induction... how much more gettyup can I get from my 240D by doing the butterfly trick?  Will it be noticeable?  Is it simple enough for a tinkerer to do? _____________________________ 1998 E320 167,000+ Interstate Cruise Missile Mercedes High Mileage Certification 1982 240D 314,000 + 2 High Mileage Certification Badges (in reply to ForcedInduction) Post #: 4

RE: Very sluggish 240 - 5/31/2008 2:21:26 AM    ForcedInduction Posts: 731 Joined: 5/20/2006 From: Federal Heights, Colorado Status: offline Its very easy. You have 4 options. Good- Remove the linkage and wire the butterfly open. This will just disable it Better- Remove the butterfly flap. It should just be 2 screws holding it onto the shaft. This will remove a bit of restriction. Best- Make a delete tube to remove it entirely. This will flow much more air since the tube can be a much larger diameter than the butterfly throat was. Alternate- Swap your intake manifold and air cleaner with a pre-1981 model that does not have an EGR. It should be most noticeable at part throttle when the valve would have otherwise been partially restricting airflow. The engine will run cooler, more efficiently and flow more air. _____________________________ 1980 240D 3.0VNTi 216K Miles. OM617.95, GT2256V VNT turbo, 4-speed manual, Intercooler, 3.46 diff, 15mm rear swaybar, ALDA removed, no EGR and Amsoil by-pass oil filter. Currently 107HP and 195lb/ft of torque at the wheels. www.youtube.com/Turbo617 (in reply to Scuddog) Post #: 5

RE: Very sluggish 240 - 6/11/2008 6:10:52 AM    Scuddog Posts: 89 Joined: 6/4/2007 Status: offline Forced Induction - I think that I want to remove the butterfly flap.  Is this the flap that I see when I take the air filter housing cover off?  If so, what is the best way to get to it so that I can unscrew the 2 screws that you talk about.  Any help is welcome here.  I''m really starting to love working on this motor.  It''s so simple.  No computers and other crap to bog the process down.  Also, just did the Diesel Purge this past weekend.  It made a noticeable difference.  I can truly feel the accelleration on the hills etc...  How often should I do this again?  Anyway, thanks in advance. _____________________________ 1998 E320 167,000+ Interstate Cruise Missile Mercedes High Mileage Certification 1982 240D 314,000 + 2 High Mileage Certification Badges (in reply to ForcedInduction) Post #: 6

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