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missfire problems

3619 Views 1 Reply 2 Participants Last post by  Takeda
Anyone know how to test spark plug coils, the garage told me four of them are bad.

I can replace them myself, I just need to know how to find which ones they are.
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Are you getting any misfire codes? They should tell you which cylinders have a problem. You can also measure the primary and secondary resistance, and compare the measurements.
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