I need them to help me, I suffered from the theft of my jewel and when I recover it for a problem that I have not been able to detect my car, it is generally stopped between 20 and 60 km per hour, when it reaches the seventies it is released and normally walks, but under sixty and appears again the braking on the wheels destabilizing a little and giving the typical sounds of wheels skating, some mechanic told me that they would Injectors or refinement but clean everything and remains the same I suspect as if it were traction.