up until this last post, i thought I might have an answer for you, but I'm not sure, so here goes. I own a 300sd. On the top of the valve cover is a mechanical triangle piece that bolts into the cover and connects all the throttle thing a ma jigs. (notice all the technical terms). Once when I did a valve adjustment, I hooked up these mechanical arms in the wrong place. When I drove the car it lacked power. i.e. the way I screwed up the metal rods, I stopped the engine from getting full power. The throttle could not open all the way.
As Brian said the first choice would be filters, then fuel hoses. So if that fails, get a picture of the top of a working 123 and be sure your metal/mechanical arms are in their proper place.
just my 2 cents.
Chuck
84 300sd (almost 250,000)
--- In diesel_mercedes@yahoogroups.com, Barry Edwards <duckn8r@...> wrote:
>
> Well the only things I have not done is valve's and fuel timing I had a little fuel leak that was letting a little air in making it run lean which made a bit of a nock. other than that it runs great.
> I live at the to of a mountain the road has one real steep part that if I don't get a long run at it I almost don't make it. The third gear runs at about 3200 RPMs at fifty miles hour and that's when I hear the nocking other than that I can't figure what else to do.
>
> Sent from my iPad
>
> On Apr 5, 2011, at 4:30 PM, Dean Chandler <deanstud@...> wrote:
>
> > I agree with the filters being clogged. As for wanting 40mpg, stop now,
> > you are wasting time and energy. It won't happen.
> >
> > -Dean E. Chandler
> > KE7TWY
> > '86 SDL
> > Cornelius, Oregon
> > deanstud@...
> >
>
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