brother, i can safely say that u are mistaken! while it IS possible that unburnt fuel is ignited in the exhaust, it is however, not plausible in a civic. if it was a turbocharged toyota supra or sumthing similar then yes, possible. but civics etc dont throw so much unwanted fuel out. this would kill the fuel economy! the whole difference b/w EFI and carby cars is this that in EFI, the ecu puts an accurately calculated amount of fuel into the engine.
can u post some close up pix of the flame kit? did u get it installed urself or wat? as for google.com, if i knew nothing about it i would have googled without u saying. but fortunately, i do have some idea about the thing.