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post #1 of 7 (permalink) Old 01-18-2013, 02:06 AM Thread Starter
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Testing ignition coil

trying to test my ignition coil. I got a wire running from both blades on the connecter to the battery. I don't see a spark, plus the coil gets hot. But I hear the spark plug tick when I rub the negative wire on the neg terminal.
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post #2 of 7 (permalink) Old 01-18-2013, 04:08 AM
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Actually only one side is being feed voltage, you just don't have a ground on the other side until the ignition module/computer switches the coil on. I'm sure someone could be more specific on how and what to test if you explained what type of problem you are having. I would try swapping coils to see if the problem follows the coil on a misfire, and I would check the crankshaft sensor if it was a no start.

Last edited by MasterTech; 01-18-2013 at 04:13 AM.
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post #3 of 7 (permalink) Old 01-18-2013, 04:12 AM
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I think he his referring to his 2002 ES 3.5L
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post #4 of 7 (permalink) Old 01-18-2013, 04:14 AM
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Ya it's late, damn, 'edit'.
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post #5 of 7 (permalink) Old 01-18-2013, 09:55 PM Thread Starter
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I'm trying to find out if its my ignition or my wiring from my PCM.
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post #6 of 7 (permalink) Old 01-18-2013, 11:48 PM
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a coil must go through saturation(powered up), then the current must be broken to produce a spark on dc voltage. that's why you hear it when rubbing on the negative. you are pulsing the connection on/off.
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post #7 of 7 (permalink) Old 01-19-2013, 02:22 AM
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You can use a NOID light to test the pulse! in the harness and PCM
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