Yes smell could be from H-pipe most likely. Check or replace your coil if it's old. I had my coil go bad and caused this problem and/or your ignition module can be the problem(on the inner fender wall passenger side under the stock filter housing). They go bad sometimes. I changed those two when i had the ignition problem.
BUT i checked every where for the problems such as burned or cracked spark plug wires etc etc.
It is located inside the passenger side fender. i smell fuel after my x-pipe install. Mine is off road also, so i steer towards more to H-pipe. But it could be your lines. check to see. :thumb: