Im working on a 1989 Pontiac turbo firefly and I need the colors on the wires for the mass air sending unit. The mass air unit comes out of a 87 Sukuzi Swift turbo and it has 5 wires, but the Firefly has 4. It has 4 green wires and a white one and the firefly has 4. We figured out 3 of them, but don't know about the white one. Can you help me out on this one?