Testing the Ignition System No Spark

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Joined: Mon Jan 13, 2014 2:36 pm

Re: Testing the Ignition System No Spark

Post by telforddorr » Wed Dec 23, 2020 2:39 pm

One point to add: if the test light shows pulsing power to the coil, and your ignition system uses points (e. g. non-electronic), before writing off the coil, test the condenser (by meter or by substitution). Without a good condenser, you cannot mechanically break the coil power fast enough to keep all of the coil energy from being dissipated in an arc at the points. [Obviously, electronic ignitions don't suffer from this problem, as transistors can switch off in nanoseconds.]

Note: DO NOT routinely replace condensers, as the new production units seem to be of rather poor quality.
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