Quote:
Originally Posted by NoDOHC
I thought that the stock coils fired using wasted spark. This is usually configured so that the current must pass through both plugs. It seems strange that a wasted spark system could possibly fire on only one of the plugs (are you sure about the cause of this symptom)? I am using the stock ignition and I only get misfires if I lean the mix up too much. Otherwise the engine purrs as smooth as glass. I think it might be more of an ECU issue.
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The leadings coils fire wasted spark, the trailings do not. The leading coil is essentially one coil with its output wired in parallel with 2 towers. So for every spark event triggered on the input side of the leading coil, in theory you get a simultaneous spark firing at both leading plugs.