over fueling mate , till it clears i guess .

ive got the same probs with my 2.1

yours drives mine doesnt , get it to a garage and see if the co is set correctly , 3.5 % at idle
also check out the fuel pressure 3.5 bar but cant rember if thats with the vacume hose on or off ???

last thing it may be is the fuel pump , or wiring breaking down but that doesnt tally up with the poor fuel consumption .