Visible physical damage, such as cracks, corrosion, or excessive carbon buildup on the coil casing. Common Symptoms of a Failing Coil Identifying a faulty ignition coil early can save you from more extensive repairs down the line.
Fix Intermittent Spark by Inspecting the Coil for Physical Damage
From there, the current travels to the ignition coil, where it is stored and then released as a high-voltage surge. The primary winding usually registers a very low resistance, often between 0.
5 ohms, while the secondary winding shows a much higher resistance, generally between 6,000 and 18,000 ohms. This small, cylindrical component is responsible for converting the battery's low voltage into the thousands of volts needed to create a spark at the spark plugs.
Fix Intermittent Spark by Inspecting the Coil and Connections
Examine the unit for any cracks in the plastic housing, as these allow moisture to enter and destroy the internal windings. Testing for Spark Resistance tests are highly accurate, but confirming that the coil can actually produce a spark is the ultimate verification.
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