How Do You Diagnose A Faulty Ignition Coil?
If your engine is backfiring, stalling or failing to start and you have noticed a significant decrease in fuel mileage, these could be signs that your ignition coil is failing. As with any automotive trouble, it is always best to confirm the source of the problem before replacing any parts. You can use a digital ohmmeter to test your vehicle’s ignition coil at home. Purchase a replacement coil from a dealership or auto parts store if you find that yours is faulty. Use a socket and ratchet to disconnect the negative battery cable. Place the cable securely away from the battery. Pull the feed wire out of the coil. The feed wire is a large wire that typically connects to the top of the coil. Use a wrench to remove the bolts securing the remaining wiring to the coil. If there are no nuts securing the wires, release the locking tabs and pull the wires straight out of the connection. Connect the red test lead of a digital ohmmeter to the primary side of the coil and the black test lead of th
