Just bought this car last weekend and it doesn't want to run smoothly and wants to spit black fuel deposits out the tail pipe etc... does it sound like a coolant sensor and does it even have one..? Whatever the case it blows black clouds like my diesel when you crank it. thanks guys

It is running rich, so your air/fuel ratio is off.

You should post this in the tech section, though, as you will quickly get far more answers about this than you will here.