I the pic in the above post the lower part of 2 is spring loaded. When the Throttle is at idle does it that lower part of #2.

If not you need to adjust #2; #2 is the Idle Adjustment Screw and you need to loosen the Nut in the Middle in order to turn the Adjustment And tighten that Nut when done.

If it turns out #2 is broken off of the Housing one of our members had a way to fix that.

Back to the picture. If you follow the Throttle Lever all the way to the left you will notice there is a hole in it. There is supposed to be a Spring hooked into that Hole and the Spring goes down to a Bracket that bolts to the Engine Block down under the Rear of the Fuel Injection Pump and there is another hole for it to hook into.

See if that Spring is still there.

__________________
84 300D, 82 Volvo 244Gl Diesel