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

To test the condition of your spark plug wires, we created this simple DIY diagnostics inspection to keep your car purring along.

On the surface, spark plug wires are a pretty basic part – they carry spark energy from the distributor (or coil) to the spark plugs. But when you actually go to purchase a set, you find out ...