Posted by 4play on September 12, 2014 at 00:03:39 from (72.198.40.196):
In Reply to: stumped on spark issue posted by normmack on September 11, 2014 at 19:02:23:
Its been stated already but I will repeat again. Check compression, a low comp cylinder does not require as high of a voltage to jump the gap therefore the spark will appear weaker. A lean cylinder can do this too "lean misfire" Go ahead and check spark by allowing the wires to jump to a ground (not spark plug) they will probably look the same, if not then check cap, dist shaft/bushings, wires etc.
This is the same thing as a low compression engine will not benefit from a high output coil as the spark voltage needed to jump the gap is lower. There might be a small benefit if you also extended the gap of the plug but only if a hotter spark was actually needed.
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