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  1. GTDM Mot fail 'Emits excessive metered smoke'

    Alfa 147, 156 & GT
    Mot failure for amongst other things 'Exhaust emits an excessive level of metered smoke for a turbo charged engine'. In other words it leaves a plume of black smoke when you give it a boot full. Anyone got any ideas on where to start to try and find out the problem. I did first notice the smoke...