Alfa 159, Brera & 946 Spider
My 159 Ti TBI has developed an infrequent and intermittent 'dip' in power, when getting up to speed (usually in 4th gear between 2.5k - 3.5k rpm but has happened once in 6th, too). The turbo appears to drop boost. The car doesn't lose speed, but won't accelerate.
Sadly, I don't have an...