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Old 08-05-2004   #1 (permalink)
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how many volts should be going into an ignition coil? i had one burn up and replaced it with another (used gill) and it started smoking. i didn't want to try another coil without some sort of test. is it common for the igniter to go bad and send the wrong voltage to a coil? or do only the coils go bad?
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Old 08-05-2004   #2 (permalink)
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Check the voltage going into the two good coils, and compare that with the suspect one. I have heard of ignitors going bad.
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Old 08-07-2004   #3 (permalink)
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i have 12.5 volts going into #1 and #2 coils. both operate fine with good spark. I have 14.0 volts going into the #3 coil and it does not produce a spark. it does get real warm though. it still works because i checked it on the leads for the #2 coil. does the whole ignitor unit have to be replaced???
how much
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Old 08-07-2004   #4 (permalink)
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I don't think the voltage difference is significant. Battery voltage can be as high as 14.5 on a healthy bike.

Have you tried swapping two coils complete with all connections?

A new ignitor would be big bucks
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Old 08-09-2004   #5 (permalink)
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i put a known good coil on the lead getting 14.5 volts and it would not work. i was afraid to keep trying for fear of ruining it. could i somehow place a voltage regulator in line of this coil as opposed to getting a new ignitor??
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Old 08-10-2004   #6 (permalink)
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I suppose you could in theory put an inline resistor in the line, but I'm getting way out of my depth here.. but I still find it unlikely that the coil would not spark simply because it's getting 14v instead of 12.5v

AFAIK the coil fires when the power supply is interrupted- if the voltage is constant the coil would not spark, but it may heat up like you say.

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Old 08-10-2004   #7 (permalink)
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I suppose you could in theory put an inline resistor in the line, but I'm getting way out of my depth here.. but I still find it unlikely that the coil would not spark simply because it's getting 14v instead of 12.5v

AFAIK the coil fires when the power supply is interrupted- if the voltage is constant the coil would not spark, but it may heat up like you say.

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