Actually the two sibling plugs fire at the same time, each revolution ... one plug being on "compression stroke", and one plug being on "exhaust stroke" (some say a "wasted" firing). All this is for saving money ... one ignition coil (the Winny has 3 coils in the "pack") for two cylinders.
{This is done on all modern gaso engines with an even number of cylinders (I think). An engine of 5 cylinders, such as Volvo's ... I would think would have a coil for each cylinder. Some Volvo expert can verify perhaps.}
So if you swap cables, at the pack, for cyls #3 and #4 ... there should normally be no difference. But, in your case, perhaps the misfire would relocate to the other cylinder ... that would be beneficial knowledge!
Last edited by 12Ounce; 06-04-2009 at 11:08 AM..
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