Just installed a custom turbo kit for my civic. im running 8psi and the vafc hack w/ dsm injectors. Well im driving it today and there is no check engine light on so im happy. When it got dark, i wanted to see how hard it pulled. So i drove the car hard. Went up to about 80mph from a stop. it pulled pretty nice and the check engine light wasnt on. Then about 1 minute later im going about 40, drop it to second, it pulls hard, i redling, shift, then at about 80 mph while im still gunning it, the check engine light comes on and my car stopped accelerating. i felt a force on my gas petal, and i couldnt floor it. Does anyone know why this happened. Its happend before too but i dont know why.

Thanks