Question about 1981 Suzuki Gs 550 L

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Ive got new coils but one bad plug wire but no spark to any cylinder that wouldnt short the whole motor would it?

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  • yadayada
    yadayada Sep 08, 2010

    clarify what u are saying here, very confusing post like u have no idea how this works, is that the case?



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No, one bad plug wire would not stop the others sparking. Does your bike have points, if so I can help as I have a wiring diagram.
Go through the obvious first, check all connection are clean and secure, esp in the area where you have fitted the coils. Did you change the coils as the bike didnt run before? or was it just running poorly?

Posted on Sep 08, 2010


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Subaru engines (including Legacy and engines of many other automobiles, GM, etc.) have returned to so-called wasted spark ignition systems since advent of the electronic distributor-less ignition (having been used historically in early engines with magneto ignitions). With this approach, the ignition systems are less expensive and usually quite reliable. At the same time, however, a shorted spark plug (cracked or carbon clogged, etc.) (or bad ignition spark plug wire) grounds both the ignition spark and the false spark being used. This means that it also grounds the corresponding respective ignition spark of the other 180 degree out of phase cylinder (that uses the same the same coil because the spark current is connected to the spark plugs of two cylinders). Since such a defect allows more current to flow in the spark coil to two plugs when the resistance of the spark plug gap disappears due to a cracked plug, etc, it seems likely to hasten coil burn out if the spark plug/plug wire defect is not corrected before installing the new spark coil.

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