i have a 90 civic std hatchback this is some of the more important mods
-dohc zc
-89 integra ecu
-t25 turbo
-msd ignition
-450cc injectors
-apexi safc
-255lph fuel pump
i am running 10psi this car never has a light till every time i hit 115-120mph
i pulled over and looked at the codes and it gave me o2 sensor, map,speed sensor
turn it off and start it back up and its fine again any ideas?

Take it to a dealer and have them find out the exact code so you know exactly what went wrong and not a list of things that could have cause the code.

drive the speed limit!!!!!!!!!!!!!!!!

maybe thats your engine's way of yelling at you for driving that fast??

thanks for the help polygon
ill try that

other thing would be to remove the speed governor... but you should'nt be going over 80mph anyways.. except at a dragstrip, and even then you'd be lucky to get up to 90mph..

the lights are from your engine craping on itself when it realizes how fast its going, i say take her to 130-140 and see if she still does it!