Find some triple refined or better butane (I use Vector from CI). It sounds like you've got some jets blocked with the impurities from your butane. Sometimes a shot of compressed air into the jets is enough to dislodge the gunk. Others use the butane itself and spray it into the jets to clear. That's the first step. Clear the jets. Also, after filling, resist the urge to try it out until the butane has a chance to warm up, maybe 15 minutes or so.
I have the Bugatti and mine works fine. Nice heft to it and the dual flame pointed towards each other make for a nice flame with pin-point accuracy. I have another on the way. Free is good.
