I have a 1996 850 turbo wagon with ~140K miles. Generally, it runs well, however it recently started to idle very rough and eventually die during idle.
This usually only occurs after the engine is warm and after I re-start the car.
After re-starting, the engine starts to run very rough and eventually dies. I've noticed black smoke from the exhaust during this rough idling time and also a funny smell of the exhaust. Again, this is very intermittent. After the car has been sitting for 20-30 minutes or so when I start it back up, it's usually fine. I'll bring it in to check the codes but thought I might get some ideas from this group if there are some basic things I should check first. Thanks !