Things You'll Need:
- OBD-II code scanner
- Socket wrench
- Sea Foam Engine Treatment
- Rags
- Flashlight
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Step 1
Connect the code scanner to the Taurus diagnostic connection (located near the gas pedal). Use the scan tool to determine which plug(s) has a misfire. If you do not have a code scanner, you can visit a local auto parts store. Most national chains will pull the diagnostic report free.
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Step 2
Remove the boot cover from the troubled spark plug. Use the socket wrench to remove the plug for examination. If the plug is dirty, clean it. If the plug is not dirty, it probably needs to be replaced. The spark plug cylinder numbers are 1, 2 and 3 on the passenger side and 4, 5 and 6 on the driver's side, when facing the vehicle.
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Step 3
Clean the spark plug by saturating the plug end in Sea Foam Treatment for 10 to 15 minutes. The Sea Foam will loosen the grime on the plug, allowing you to clean it easily with a rag or towel. Let the plug end dry completely.
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Step 4
Check the cylinder well where you removed the plug. Shine a flashlight into the hole and look for water. Water often gets in during engine washing and can cause plug malfunction. Dry out the well and see if the misfiring stops.
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Step 5
Check the spark plug wire. A faulty plug wire can issue the same diagnostic warning and cause the same symptoms as a bad spark plug. Inspect the wire for damage.
