HI all. HAd a problem with lots of black smoke on my 03 Laguna so though I'd add my experience.
As usual, loads of black smoke on acceleration and puffing when surging at constant speed. Took advice from the forum and removed the coal in the
but made little difference. Got me thinking as to why the
would be sooted up in the first place but befroe I could investigate it developed a loud hush when the
Long story short, took it to the dealer who saud the hush noise was because the intercooler was split in half because the computer was over boosting and overfueling. New intercooler, remapped
and all fine and dandy, if a little slower.
Must be a common problem though as new intercoolers have reinforced banding to stop them splitting.