Hello alfa lovers),
my Alfa (156 2,4 jtd 110 kwt 2002) sometime has poor performance before 2200 rpm, after this come cloud of black smoke and car start moving very good, also have malfunction with out temperature sensor - always showing +4 C degrees more.
I start diagnose car with elmscan and get very strange live data: engine idle speed - 189 rpm and engine temperature was 240 C
( the temp gauge in the car show only about 40 C ) . I tray different diagnostic soft via ELM327 chip - same picture...
In general, my alfa working as its wants - some time moving good, some time like i must help with my leg throught open door, untill engine reaches 2000-2500 rpm...
Car came from France - i bay it on action - no history ,no service book and not in perfect conditions( some paint defect, interior was full of crap, but mechanical part was ok.)
Where I must start to search? Maybe ECU was reprogrammed or "chiptuned"... Maybe somebody can help?