Fiat Punto engine flooing

Firstly I changed the front section of exhaust as it was blowing. Then the head gasket went and the thermastate both at the same time. I have replaced both of these but in doing so i broke the hose that leads from the air filter to the back of the throtle body. i have not replaced this as yet. As the engine was apart I also changed the air and oil filter and put a new set of plugs in. The car ran much better after all of that but last night as i was driving the engine just cut out. It would restart but sounded realy rough as if it was only running on 2 cylinders and had no power. Taking off the air filter the throtle body was full of fuel. The engine was flooding what could be the cause.