when i go and start my truck..It starts right away but there is a weird fuel stench that comes into the inside of the truck..also the truck is not running too good..Like hesitant..mostly from start and around 70-100 kms when you are driving..could it be the fuel Filter..I just had one changed last summer...

 

Could be any number of things, but I think you may have an exhaust leak and clogged cats.

 

It may be easier to take it to a pro and have it checked out. It may be quicker than going through the process of elimination in your garage.