i have owned my spacewagon for only about two months so still under warranty. it has been back in the garage about four times since with problems all relating to the fuel system. it has so far had a carbon blast new cat and an injector. It still blows out black smoke under hard acceleration and on tick over suddenly dips to about 400rpm and then jumps back. This is in addition to heavy soot around the exhaust pipe and a kind of fut fut note from the exhaust. The dealer can't seem to pin point the problem. Can anyone advise before i go completely crazy. Incidentally it's only done 63000 miles.