Smelly exhaust

[reichejh]

I'm getting a somewhat blackish smoke coming out of the exhaust, especially after starting the car on weekends after sitting idle during the week. I initially put it down to condensation, however the smoke was not white and was smelly; felt like driving a diesel... Now, was out for a drive over the weekend with a friend who was driving behind in his boxter (as you would expect ). He told me later that I had smelly smoke coming out of the exhaust pretty much at all times during our drive, especially when flooring it.

Any suggestions what might cause this?

[Cider Andy]

Black smoke sounds like mixture or ignition. How does the engine perform? Has fuel consumption increased?

[that daddy]

if its smelly you may find its over fueling,your giving the catalyst more work hence the smell best described as eggy/stinkbomb smell,if so that could be faulty oxygen sensors,ECU temperature transmitter etc,not necceserally in that order.get a 4 gas emission test done,that will confirm lots.

[the dodger]

Drain out smelly diesel and re-fill with Optimax.