hi ive got a 2001 bugeye wagon wrx, ever since i removed the cat from the up-pipe the car seems to cutout/misfire when accelerating past 80 mph ( on the autobahn). the car is standard apart from turbo back japspeed sports cat system, does it sound like i require a re-map or could it be something else?? the car also sometimes struggles to started until it does a loud back fire then springs into life!! was funny the first time but scares the life out of passes by!! any suggestion appriciated

 

you are hitting fuel cut and need a remap to compensate for all them mods you have done.