Alfa 159 1.9 jtdm possible exhaust leak
Okay so another lovely problem with the alfa. Drove down to the Isle of white yesterday but about halfway there, the engine warning light came on and it went into limp mode. Pulled over and plugged the obd reader in. It was boost pressure sensor A circuit low in the turbo / super charger. I had cleaned the turbo a couple of weeks ago as this used to come on all the time. Cleared the fault and carried on. The engine felt very rough between idle and 1300 rpm (ie the engine would judder and vibrate through the car), and about 2 minutes later, on the motorway, soot started comming out of the exhaust for about 30 seconds under light acceleration
No more smoke or warning lights for the rest of the journey, but the engine is still misbehaving at low rpm. I got the Mrs to hold a towel over the exhaust when we arrived and I can hear a hissing from the manifold area. The cab does smell a bit fumey when the vents aren't recirculating. Does this sound typical of an exhaust leak? Or is it something more Terminal?