HI my check engine light comes on after about 15 min of interstate driving, it seems to be running ok, except for some loss of power. Where do you guys think the problem lies, with the injectors, fuel pump, Fuel regulator... Im pretty sure its not the filter. Oh by the way, I was using an fmu for a turbo appication. My guess would be the injectors are bad because of the fmu... But why would my check engine light come on after 15 min of driving?