How do you test an ignition coil with a multimeter?
Insert one of the multimeter's probes into the center opening of the coil, contacting the metal terminal inside the coil. Touch the second probe of the meter to the ignition coil's grounding terminal. The meter should read 6,000 to 15,000 ohms. If it does not, the coil's secondary winding is faulty.
How do you diagnose a bad ignition coil?
- Illuminated Check Engine Light. With most modern vehicles, a faulty ignition coil is enough to turn on the Check Engine Light. ...
- Misfiring Engine. If an ignition coil is not working properly, your engine will likely misfire. ...
- Hard Starts. ...
- Worsening Gas Mileage. ...
- Diminished Power. ...
- Sudden Backfires.