RobBrown
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| posted on 31/8/13 at 12:06 PM |
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Coil Pack resistance
Just tested my coil pack and have 1.4 and 1.8 ohms across each of the banks.
Is this acceptable or within tolerance. Should they be the same?
I should add the resistance is between pins 2&3 and 1&3 (left to right 1,2,3)
Thanks
[Edited on 31/8/13 by RobBrown]
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RobBrown
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| posted on 31/8/13 at 01:03 PM |
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after a bit of googling thought maybe I was measuring between the wrong pins
so using the centre pin (no 2) as the common, pin 1 is 34.6 and pin 3 was 31.5ohms.
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RobBrown
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| posted on 31/8/13 at 01:11 PM |
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found this
testing web site
 
Description
Looks like my second test was right but the values would indicate a faulty coil pack? Would you agree?
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britishtrident
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| posted on 31/8/13 at 02:55 PM |
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When coil packs cause a misfire it is usually because the HT insulation breaks down as the spark voltage demand rises under load.
The other coil/coil pack fault that used to be common in the days of points ignition but less so now is burn out of the primary wimdings due the
coil overheating usually due to the ignition being left on or running without a ballast.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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RobBrown
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| posted on 31/8/13 at 04:10 PM |
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If I'm running the HT leads close to one another is this likely to cause an insulation breakdown?
The symptoms have only started to occur since I've fitted this coil pack along with Megajolt. I didn't have this issue with the dizzy
setup (cutting out at high revs).
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