Sparks coming from Plug Boot

[cmptrphreak]

AlAlright I was taking off my spark plugs wires of the spark plugs one at a time and I noticed that when I took them off the spark would shoot out the boots by the coil. Is this normal ? The wires are MSD 8.5MM Not that old too.

 

[96_charcoal_tsi]

Is this happening while the car is running? if so then it is completely normal and is just showing you that you are getting spark through that wire.

 

[motorboat]

If you are doing this while the car is running thats fine. Why are you removing them while the car is running though? just curious. With them sparking, all that is happening is that instead of the spark plug getting the spark from your wires, it is gapping from your plug wires to your valve cover probably.

 

[steve]

It shouldn't be arcing.

Doing so damages the boot or the coil tower or is because of existing damage to them.

 

[97 gst turbooo]

I had misfiring issues due to the rubber being wearing away. The wires werent old only about 6 months but they were arking. I got some 10.4mm Jackson racing wires and no problems. But if the car is running this is normal due to the spark jumping somewhere else rather than the plug.