Car smelling like fuel

[Treillage]

So ive just replaced the had gasket new bolts rings injectors everything back together but now im getting this strong smell of petrol in the front of gar and a whistling sound. MY Fuel rail pressure sensor looks like its bust up is as the plastic sensor broke away from the metal part of the sensor. What else could it be .Car was misfiring on cylinder 4 but that stops just seems to jerk sometimes .Possibly fuel to rich over over fueled please help guys

[1.4_tsi]

When you say strong smell of petrol in the front of car, do you mean under the bonnet? If so, surely that is a fuel leak?