i have a 94 integra gsr, and i blew the engine in it. so i bought a longblock b20b and dropped it in. i converted the wiring harness for all the obd2 plugs and it started right up fine that day. it ran a little off time, with some backfiring and stuff. well i ventured to find an ecu that could run it better. i bought a p06 and had it chipped by phearable.net for all the b20 specs. i got it back and plugged it in, and it still runs crappy. the problem was ever since i pulled the p72 ecu out the car wont rev past 3500 rpms. now that i got the ecu that supposedly should run my car it still cuts off at 3500 rpms. i have a 2 step rev limiter set at 4300... thats not it, my speedo works. i checked which codes it has... its throwin an IAC valve code, which should have nothing to do with why it wont rev. im lost!! please help me i have nowhere else to turn for answers at this point. thanks guys!!