Ok i'm trying to help a budy of mine that after 3 years just got his motor fully built,put into the car got it to run once or twice but now won't start at all.This motor is a fully built b18c5 81mm with je pistons and eagle rods.Full brian crower head exluding the re-ground skunk2 cams.We got it to run the first night after we got everything swapped in.Now it won't even run.The spark plugs are black and it keeps flooding.We have turned the FPR down to 35psi which is stock for the b series motors.He has 680 RC injectors tuned down cause thats all we had at the time.It trys to start but just won't.He has told me now that he dumped octane booster into the fuel tank without a full tank so what im thinking is change the spark plugs,fuel filter and spark plug wires and drain the fuel lines a little bit to get that octane booster out of them and run just fuel.Timing may be a little off but we just want it to start.If anyone has any input please let me know.