The engine on my 81 Diesel Rabbit has a noticeable miss just above idle.
The miss is noticeable when the RPMs are held between 1000-1500 RPMs or so. (No Tach...just by sound/experience).
The engine also smokes while the throttle is held open and will darken when the throttle is "blipped". It does not appear to smoke at idle.
Bad Fuel ?? Bad injectors ?? What ??
Moved to troubleshooting.
i would wager on the injectors, or possibly bad compression? anyone else?
i replied where you posted about this somewhere else,faq's,,i think,,check there,i replied how to check injectors