Around one month ago I have replaced my spark plugs and respective wiring. Everything was fine to until one week before, when the car started to misfire (struggle?) in the morning when car is cold. I checked the wires right after starting the vehicle and I felt electrical shocks, so I guess the wires are arcing. When I run about 5 kms, the problem goes away. The question is: what should I do to make it run smoothly from the start? I guess it might be caused by accumulation of the moisture during night(since it is parked outside).

The car is Mitsubishi Lancer 1.3 GLX '99.


1 Answer 1


You could try greasing the outside of the plug leads with dialectric (silicone) grease. This is standard procedure when servicing certain Citroen vehicles.

  • Oke, thanks for advice, makes sense. Going to buy silicone grease today and try to report the results tomorrow morning.
    – Serhiy
    Jun 19, 2015 at 9:02
  • Good luck! Hopefully it does the trick and if so is a nice, low cost solution. Jun 19, 2015 at 9:17
  • It may also be worth mentioning that Q20 (the original WD40) was created specifically to address this problem. Jun 19, 2015 at 9:17
  • @Juann Strauss I actually do have WD40 at home. But it is spray.. I am not sure how to apply it without spraying too much on metallic parts.
    – Serhiy
    Jun 19, 2015 at 10:26
  • Liberal amounts of WD40 sprayed all over the outside of the plug leads will, at least temporarily, have a similar effect as silicone grease. You won't damage anything by spraying it with WD40 so it's well worth a try next time your car is cold, slightly damp and hesitant to start or run smoothly. Jun 19, 2015 at 10:29

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