black smoke and poor economy
hi everybody i'm brand new to this site so please forgive any naiveity, and i'm sorry my first post is for help, but i just can't figure it out. so ive got an 850 r auto estate with 110,000m on it, it was imported from japan in 2005, and its started to smoke, ive read a lot of threads on here but not found the exact problem. symtoms are black smoke on idle and some time on heavy acceleration and gearchange, rough lumpy idle sometimes, also on idle every 10-15 seconds you here a click from engine bay which sonds like a solenoid or relay, every time this happens engine idels differently and amount of smoke from exhaust changes sometimes dissapears/ reapears, also high fuel consumption. a while back a volvo specialist said change air flow meter so i did tings settled down no smoke 29 mpg all good, now its started again but a bit worse than before, took alot of cranking to start the other day when hot big cloud of black smoke and lamda light came on, no faut codes recorded. please any help would be appeciated. also im getting blue/black smoke when getting back on the gas after its been on overrun- im thinking turbo seals, but will accept other diagnosis. so are these seperate issues or do you think there is a connection. many thanks in advance if you need any other info please ask
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