what happened?????

my car sat for like 20 days and today i was gong to take it for a spin so i turned it o and it wouldnt hold idle..............smoke coming out fro the rear?????, so i started checking the intake system and guess what, the airflow plate doesnt open or close when i press the accelerator pedal, i guess something came off, but what?? maybethe spring came off? from what i hear i i pull the accel lever in the engine its like an obstrucion on the spring or something.

sorry 1985 euro 190e 2.3 16v