dohchatch

ive got a 93 hatch with a b16 and a p28 computer. i was changing my j's racing chip for a mugen set at 5,700 rpm vtec and a max rev of 8,800. when the swap was done i cranked the car and imediatly the check engine light came on, i drove the car slowly at first and noticed what felt like a little bit more power. when i got on it it climbed to 7,000 rpm and no vtec. i swaped the j's racing chip back in and it drives fine but no vtec and the light is still on. right now ive disconected the batery and im letting it sit for a while. please help