the reason that it won't run is probably because most newer cars that sense anything other than gasoline in the system won't run. all you should have to do is flush the gas tank, fill it back up with gasoline and you should be fine. the reason it ran before is because the system used up the last amount of gas before the diesel went into the lines. you can call acura to make sure but this is my experience (my friends aunt brought him a can of diesel that she thought was gas when he ran out)