ok i have a civic with a GSR motor in it and the rev cuts out at like 2500-3500 its not the injectors i dont think i power tested them and they all remained with power while it was cutting out so i would guess at it being a spark problem i rewired the plugs from my OBD1 Distributor to the wiring on the civic chassis and so that it had 2 plugs instead of one, the wierd part about it is that i can rev the car if i rev it as soon as it starts but once it runs for more than like 4 seconds it will cut out like its in safe mode or something any help is greatley appreciated thank you for looking

 

sounds like your ecu is running in limp mode...are you running a chip in your ecu because ive heard of them going bad and having similar issues