Petrol Smell revealed

Well guys i found out where the smell of petrol was coming from, after putting it in for its yearly MOT when the car was up on the ramp the petrol was dripping on from the fuel pipe that goes into the fuel tank, this only happened when the car was running, hence when i checked if there was a leak before but couldnt see any petrol on the ground. I have got it fixed and its a totally different car after getting all the work done on my car after it failed on a few bits and made me £1210.00 lighter in my pocket (great investment), how ever the i am still smelling petrol when i am on the motorway, so i think i might be running rich, i have just put fuel treatment in the tank to see if this will clear the injectors incase there might be a build up in there.

has anybody else experienced this if so please can you advise me what to do.