Bought a mk3 that had a vr6 swap. The owner swapped a 2.0 from a jetta into it after that because he messed up the swap. It will run when it wants to now. I think maybe the owner left the vr6 wiring harness in it and tried to make that work. Does anyone know any wires the the vr6 would have that the 2.0 wouldn't have so i can tell if i need to buy a new harness? Thanks in advance.