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Last edited by cabrit; 01-09-2011 at 08:56 PM. Reason: closing thread
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You can't possibly have dead coils if the car is running. It is very hard to measure resistance less than 2 ohms with a conventional meter. If you don't have a four wire resistance bridge, you can't tell the difference between 0.4 and 1.4 ohms. But you can measure the secondary resistance.
Higher resistance means the spark isn't as hot. The lower the resistance the stronger the spark.
Make sure you're using well calibrated meter if you want the most accurate reading. Fluke makes amazing meters.
If any of your coilpacks were dead you'd have misfires or dead cylinders.
Coil packs have a primary coil and 2ndary coils and you can only measure the primary coil. If your car misses under load you most likely have a dead coil. It will be fine at idle and miss under load.
Suggest buying a coil and swapping one out at a time until you locate it. Unless you have access to a good diagnostic machine you can't determine the failed coil.
Completely forgot about the secondary coil, good catch.
oops i meant are my coils in the verge of dying.
thanks
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