Iv been smelling gas fumes on my car for a little bit now.. I Have a blox 12:1 FMU-so i checked if i have a leak and its not leaking,clamps are on there tight and iv had no lose of fuel or anything..no other modification was done to the fuel after the turbo install except walbro 255 fuel pump but thats in the trunk.
I do have holes in my CAT-could that be causing the smell?
i smell it when im at the drive through for lunch and sometimes at idle..*mainly when im just sitting there..*

any ideas?