I just recently got a 91 hatch with full b16 swap already in it, the guy i got it from has some money into the motor but ive been trying to troubleshoot what is wrong with it all of the sudden but can figure it out, it ran fine for a few days and now all of the sudden it runs like crap, it started by the engine just cutting off while id be driving and it would take me a minute to get it started again, then it just wouldent start so i replaced the distibutor cap, rotor, wires, plugs, and now it starts just fine, but when i drive it once i hit around 3,000 rpms it seems like the fuel shut off kicks in and the car starts to sputter, an buck, it dose have 2 step launch control which is set to 4,000 rpms, and the fuel shutoff it at 8,200 rpms, and a chipped ecu, i dont know if this stuff would have anything to do with the problem but im just throwing this stuff out there for anyone who might have suggestions get a better ideal of what im dealing with, the car idles perfectly fine its just when i try to drive it it acts up, im kinda new to the site and ive have hondas with swaps but im no mechanic either, ive been trying to trouble shoot this problem and im getting a frustrated please anone with any ideas or thoughts/ suggestions please help me out...i appreciate it greatly