While most spark plugs for passenger vehicles should have somewhere in the 4,000-8,000 ohms neighborhood, your exact plug may call for different values. Q: How Can You Check for Bad Spark Plug Wires?

Every small gasoline engine has a spark plug, and this key component requires periodic inspection and testing. Learn how to do it here.

2 The best way to check resistance of carbon core or spiral-wrapped plug wires is with an ohm-meter. Typically, if you have more than 10,000 ohms of resistance for an individual plug wire, it ...

Though small, spark plugs play an important role in getting your vehicle started and keeping it running—so when they’re past their prime, you’re going to want to replace them.

Attach the spark plug to a spark plug tester, then connect the tester to the ignition wire. Start the engine and observe the ...