[Merv and Sharon]

From what I understand Geof, it is because most builders wire the fuel pump separately from the original main harness (Warwick even suggested that; mine would not work at all from the harness connection) and that the pumps we use are different in terms of resistance from the original Mustang pumps. Code 15 is more important as you know, with is KOEO memory function. Peter or Jim would have more detail.