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Is it normal to see the spark flowing through the leads in the dark when i give the car a sharp bit af peddel
What you're seeing is high voltage tracking from the leads to another point outside the leds, which means that they are breaking down which is not good. I have heard that a very faint trace around the leads may not indicate a problem (I am guessing that the HV in the leads may ionize the air around them & maybe cause a discharge that way) but if the trace is fairly visible I would say you need to replace them. You can look at where they are tracking and add some extra insulation to those points also, this might help prevent lead breakdown at these points in the future (e.g. I insulated the engine lifting hook on my VP, as this used to come in contact with the leads from time to time)
Thanks guys the leads are 2 months old and are Bosch leads i was told they are good sooo can any one tell me the best leads to buy thanks