so my cousin just got a new civic si awhile back and he installed a cold air intake today. he knows that he has to reset his battery to reset the ecu and whatnot, but he asked me somethign else... does there have to be a full tank of gas in the car when resetting the ecu? i know this is a stupid question probably, but im still a complete noob. i know the ecu has to tune the air fuel ratio junk so does the fuel tank need to be full when resetting the ecu by disconnecting the negative terminal to the battery and then reconnecting it? excuse the noobness lol.