I'm working on my Mother in Law's 78 240D in preparation to sell.
Interested?
Idles great, starts great. Acceleration is weird.
Around town it always has the feeling like it's continuing to speed up even if you hold the pedal still. Contantly having to let off the throttle, which makes driving somewhat jerky. On the freeway, if you romp on it it looses power and large quantities of smoke are created. If you accelerate gently it goes up to freeway speeds and then starts to do the same thing it does around town, always have to take my foot off the throttle because it wants to speed up.
Guessing this isn't normal
What's up?

i guess that you're linkages are out of whack.

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Current fleet
2006 E320 CDI
1992 300D - 5speed manual swapped

former members
1984 300D "Blues Mobile"

1978 300CD "El Toro"

Thanks, that was my first guess. I repaired all the parts that had play in them. Adjusted the spring to a firmer position. Didn't fix it.