Hi I have a 1967 Bond Equipe Gt 4s, Which i think has the spitfire mk3 engine and twin su carbs, HS2 i think. The car has been running very badly over fueling i think as it makes lots of black smoke ! On friday i had a guy out to tune it up, He stripped the carbs down checking every thing was ok then tuned the car and it was fine, but the next day i went to the car and it was back to rubbish running reaaly badly at low revs and black smoke. I was not a happy chap ! I have taken the blacks out and they are black and sooty. I have been trawling the net for ideas of the problem and one idea i have come up with is it could a float not working correctly, does this sound right ? if so is this easy to correct ? Thanks